Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <i></i>
<canvas id="spiders" class="hidden-xs" width="1280" height="451"></canvas>
              
            
!

CSS

              
                body { background:url(https://ununsplash.imgix.net/photo-1416934625760-d56f5e79f6fe?fit=crop&fm=jpg&h=725&q=75&w=1050) center center; overflow:hidden; margin:0; padding:0; background-size:cover;}
i {
  position: absolute;
  top:0; bottom:0;left:0;right:0;
  display:block;
  background:rgba(192, 57, 43,.5);
  z-index:-1;
}
canvas#spiders {
  height:100vh;
}
              
            
!

JS

              
                
/*
 *
 * TERMS OF USE - EASING EQUATIONS
 * 
 * Open source under the BSD License. 
 * 
 * Copyright © 2001 Robert Penner
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice, this list of 
 * conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this list 
 * of conditions and the following disclaimer in the documentation and/or other materials 
 * provided with the distribution.
 * 
 * Neither the name of the author nor the names of contributors may be used to endorse 
 * or promote products derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 *
 */
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

(function() {
    var lastTime = 0;
    var vendors = ['ms', 'moz', 'webkit', 'o'];
    for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
        window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
        window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
    }

    if (!window.requestAnimationFrame)
        window.requestAnimationFrame = function(callback, element) {
            var currTime = new Date().getTime();
            var timeToCall = Math.max(0, 16 - (currTime - lastTime));
            var id = window.setTimeout(function() { callback(currTime + timeToCall); },
                timeToCall);
            lastTime = currTime + timeToCall;
            return id;
        };

    if (!window.cancelAnimationFrame)
        window.cancelAnimationFrame = function(id) {
            clearTimeout(id);
        };
}());
/*!
 * VERSION: 1.13.1
 * DATE: 2014-07-22
 * UPDATES AND DOCS AT: https://www.greensock.com
 *
 * @license Copyright (c) 2008-2014, GreenSock. All rights reserved.
 * This work is subject to the terms at https://www.greensock.com/terms_of_use.html or for
 * Club GreenSock members, the software agreement that was issued with your membership.
 * 
 * @author: Jack Doyle, jack@greensock.com
 */
(function(t,e){"use strict";var i=t.GreenSockGlobals=t.GreenSockGlobals||t;if(!i.TweenLite){var s,n,r,a,o,l=function(t){var e,s=t.split("."),n=i;for(e=0;s.length>e;e++)n[s[e]]=n=n[s[e]]||{};return n},h=l("com.greensock"),_=1e-10,u=function(t){var e,i=[],s=t.length;for(e=0;e!==s;i.push(t[e++]));return i},f=function(){},m=function(){var t=Object.prototype.toString,e=t.call([]);return function(i){return null!=i&&(i instanceof Array||"object"==typeof i&&!!i.push&&t.call(i)===e)}}(),p={},c=function(s,n,r,a){this.sc=p[s]?p[s].sc:[],p[s]=this,this.gsClass=null,this.func=r;var o=[];this.check=function(h){for(var _,u,f,m,d=n.length,v=d;--d>-1;)(_=p[n[d]]||new c(n[d],[])).gsClass?(o[d]=_.gsClass,v--):h&&_.sc.push(this);if(0===v&&r)for(u=("com.greensock."+s).split("."),f=u.pop(),m=l(u.join("."))[f]=this.gsClass=r.apply(r,o),a&&(i[f]=m,"function"==typeof define&&define.amd?define((t.GreenSockAMDPath?t.GreenSockAMDPath+"/":"")+s.split(".").pop(),[],function(){return m}):s===e&&"undefined"!=typeof module&&module.exports&&(module.exports=m)),d=0;this.sc.length>d;d++)this.sc[d].check()},this.check(!0)},d=t._gsDefine=function(t,e,i,s){return new c(t,e,i,s)},v=h._class=function(t,e,i){return e=e||function(){},d(t,[],function(){return e},i),e};d.globals=i;var g=[0,0,1,1],T=[],y=v("easing.Ease",function(t,e,i,s){this._func=t,this._type=i||0,this._power=s||0,this._params=e?g.concat(e):g},!0),w=y.map={},P=y.register=function(t,e,i,s){for(var n,r,a,o,l=e.split(","),_=l.length,u=(i||"easeIn,easeOut,easeInOut").split(",");--_>-1;)for(r=l[_],n=s?v("easing."+r,null,!0):h.easing[r]||{},a=u.length;--a>-1;)o=u[a],w[r+"."+o]=w[o+r]=n[o]=t.getRatio?t:t[o]||new t};for(r=y.prototype,r._calcEnd=!1,r.getRatio=function(t){if(this._func)return this._params[0]=t,this._func.apply(null,this._params);var e=this._type,i=this._power,s=1===e?1-t:2===e?t:.5>t?2*t:2*(1-t);return 1===i?s*=s:2===i?s*=s*s:3===i?s*=s*s*s:4===i&&(s*=s*s*s*s),1===e?1-s:2===e?s:.5>t?s/2:1-s/2},s=["Linear","Quad","Cubic","Quart","Quint,Strong"],n=s.length;--n>-1;)r=s[n]+",Power"+n,P(new y(null,null,1,n),r,"easeOut",!0),P(new y(null,null,2,n),r,"easeIn"+(0===n?",easeNone":"")),P(new y(null,null,3,n),r,"easeInOut");w.linear=h.easing.Linear.easeIn,w.swing=h.easing.Quad.easeInOut;var b=v("events.EventDispatcher",function(t){this._listeners={},this._eventTarget=t||this});r=b.prototype,r.addEventListener=function(t,e,i,s,n){n=n||0;var r,l,h=this._listeners[t],_=0;for(null==h&&(this._listeners[t]=h=[]),l=h.length;--l>-1;)r=h[l],r.c===e&&r.s===i?h.splice(l,1):0===_&&n>r.pr&&(_=l+1);h.splice(_,0,{c:e,s:i,up:s,pr:n}),this!==a||o||a.wake()},r.removeEventListener=function(t,e){var i,s=this._listeners[t];if(s)for(i=s.length;--i>-1;)if(s[i].c===e)return s.splice(i,1),void 0},r.dispatchEvent=function(t){var e,i,s,n=this._listeners[t];if(n)for(e=n.length,i=this._eventTarget;--e>-1;)s=n[e],s.up?s.c.call(s.s||i,{type:t,target:i}):s.c.call(s.s||i)};var k=t.requestAnimationFrame,A=t.cancelAnimationFrame,S=Date.now||function(){return(new Date).getTime()},x=S();for(s=["ms","moz","webkit","o"],n=s.length;--n>-1&&!k;)k=t[s[n]+"RequestAnimationFrame"],A=t[s[n]+"CancelAnimationFrame"]||t[s[n]+"CancelRequestAnimationFrame"];v("Ticker",function(t,e){var i,s,n,r,l,h=this,u=S(),m=e!==!1&&k,p=500,c=33,d=function(t){var e,a,o=S()-x;o>p&&(u+=o-c),x+=o,h.time=(x-u)/1e3,e=h.time-l,(!i||e>0||t===!0)&&(h.frame++,l+=e+(e>=r?.004:r-e),a=!0),t!==!0&&(n=s(d)),a&&h.dispatchEvent("tick")};b.call(h),h.time=h.frame=0,h.tick=function(){d(!0)},h.lagSmoothing=function(t,e){p=t||1/_,c=Math.min(e,p,0)},h.sleep=function(){null!=n&&(m&&A?A(n):clearTimeout(n),s=f,n=null,h===a&&(o=!1))},h.wake=function(){null!==n?h.sleep():h.frame>10&&(x=S()-p+5),s=0===i?f:m&&k?k:function(t){return setTimeout(t,0|1e3*(l-h.time)+1)},h===a&&(o=!0),d(2)},h.fps=function(t){return arguments.length?(i=t,r=1/(i||60),l=this.time+r,h.wake(),void 0):i},h.useRAF=function(t){return arguments.length?(h.sleep(),m=t,h.fps(i),void 0):m},h.fps(t),setTimeout(function(){m&&(!n||5>h.frame)&&h.useRAF(!1)},1500)}),r=h.Ticker.prototype=new h.events.EventDispatcher,r.constructor=h.Ticker;var C=v("core.Animation",function(t,e){if(this.vars=e=e||{},this._duration=this._totalDuration=t||0,this._delay=Number(e.delay)||0,this._timeScale=1,this._active=e.immediateRender===!0,this.data=e.data,this._reversed=e.reversed===!0,B){o||a.wake();var i=this.vars.useFrames?q:B;i.add(this,i._time),this.vars.paused&&this.paused(!0)}});a=C.ticker=new h.Ticker,r=C.prototype,r._dirty=r._gc=r._initted=r._paused=!1,r._totalTime=r._time=0,r._rawPrevTime=-1,r._next=r._last=r._onUpdate=r._timeline=r.timeline=null,r._paused=!1;var R=function(){o&&S()-x>2e3&&a.wake(),setTimeout(R,2e3)};R(),r.play=function(t,e){return null!=t&&this.seek(t,e),this.reversed(!1).paused(!1)},r.pause=function(t,e){return null!=t&&this.seek(t,e),this.paused(!0)},r.resume=function(t,e){return null!=t&&this.seek(t,e),this.paused(!1)},r.seek=function(t,e){return this.totalTime(Number(t),e!==!1)},r.restart=function(t,e){return this.reversed(!1).paused(!1).totalTime(t?-this._delay:0,e!==!1,!0)},r.reverse=function(t,e){return null!=t&&this.seek(t||this.totalDuration(),e),this.reversed(!0).paused(!1)},r.render=function(){},r.invalidate=function(){return this},r.isActive=function(){var t,e=this._timeline,i=this._startTime;return!e||!this._gc&&!this._paused&&e.isActive()&&(t=e.rawTime())>=i&&i+this.totalDuration()/this._timeScale>t},r._enabled=function(t,e){return o||a.wake(),this._gc=!t,this._active=this.isActive(),e!==!0&&(t&&!this.timeline?this._timeline.add(this,this._startTime-this._delay):!t&&this.timeline&&this._timeline._remove(this,!0)),!1},r._kill=function(){return this._enabled(!1,!1)},r.kill=function(t,e){return this._kill(t,e),this},r._uncache=function(t){for(var e=t?this:this.timeline;e;)e._dirty=!0,e=e.timeline;return this},r._swapSelfInParams=function(t){for(var e=t.length,i=t.concat();--e>-1;)"{self}"===t[e]&&(i[e]=this);return i},r.eventCallback=function(t,e,i,s){if("on"===(t||"").substr(0,2)){var n=this.vars;if(1===arguments.length)return n[t];null==e?delete n[t]:(n[t]=e,n[t+"Params"]=m(i)&&-1!==i.join("").indexOf("{self}")?this._swapSelfInParams(i):i,n[t+"Scope"]=s),"onUpdate"===t&&(this._onUpdate=e)}return this},r.delay=function(t){return arguments.length?(this._timeline.smoothChildTiming&&this.startTime(this._startTime+t-this._delay),this._delay=t,this):this._delay},r.duration=function(t){return arguments.length?(this._duration=this._totalDuration=t,this._uncache(!0),this._timeline.smoothChildTiming&&this._time>0&&this._time<this._duration&&0!==t&&this.totalTime(this._totalTime*(t/this._duration),!0),this):(this._dirty=!1,this._duration)},r.totalDuration=function(t){return this._dirty=!1,arguments.length?this.duration(t):this._totalDuration},r.time=function(t,e){return arguments.length?(this._dirty&&this.totalDuration(),this.totalTime(t>this._duration?this._duration:t,e)):this._time},r.totalTime=function(t,e,i){if(o||a.wake(),!arguments.length)return this._totalTime;if(this._timeline){if(0>t&&!i&&(t+=this.totalDuration()),this._timeline.smoothChildTiming){this._dirty&&this.totalDuration();var s=this._totalDuration,n=this._timeline;if(t>s&&!i&&(t=s),this._startTime=(this._paused?this._pauseTime:n._time)-(this._reversed?s-t:t)/this._timeScale,n._dirty||this._uncache(!1),n._timeline)for(;n._timeline;)n._timeline._time!==(n._startTime+n._totalTime)/n._timeScale&&n.totalTime(n._totalTime,!0),n=n._timeline}this._gc&&this._enabled(!0,!1),(this._totalTime!==t||0===this._duration)&&(this.render(t,e,!1),O.length&&M())}return this},r.progress=r.totalProgress=function(t,e){return arguments.length?this.totalTime(this.duration()*t,e):this._time/this.duration()},r.startTime=function(t){return arguments.length?(t!==this._startTime&&(this._startTime=t,this.timeline&&this.timeline._sortChildren&&this.timeline.add(this,t-this._delay)),this):this._startTime},r.timeScale=function(t){if(!arguments.length)return this._timeScale;if(t=t||_,this._timeline&&this._timeline.smoothChildTiming){var e=this._pauseTime,i=e||0===e?e:this._timeline.totalTime();this._startTime=i-(i-this._startTime)*this._timeScale/t}return this._timeScale=t,this._uncache(!1)},r.reversed=function(t){return arguments.length?(t!=this._reversed&&(this._reversed=t,this.totalTime(this._timeline&&!this._timeline.smoothChildTiming?this.totalDuration()-this._totalTime:this._totalTime,!0)),this):this._reversed},r.paused=function(t){if(!arguments.length)return this._paused;if(t!=this._paused&&this._timeline){o||t||a.wake();var e=this._timeline,i=e.rawTime(),s=i-this._pauseTime;!t&&e.smoothChildTiming&&(this._startTime+=s,this._uncache(!1)),this._pauseTime=t?i:null,this._paused=t,this._active=this.isActive(),!t&&0!==s&&this._initted&&this.duration()&&this.render(e.smoothChildTiming?this._totalTime:(i-this._startTime)/this._timeScale,!0,!0)}return this._gc&&!t&&this._enabled(!0,!1),this};var D=v("core.SimpleTimeline",function(t){C.call(this,0,t),this.autoRemoveChildren=this.smoothChildTiming=!0});r=D.prototype=new C,r.constructor=D,r.kill()._gc=!1,r._first=r._last=null,r._sortChildren=!1,r.add=r.insert=function(t,e){var i,s;if(t._startTime=Number(e||0)+t._delay,t._paused&&this!==t._timeline&&(t._pauseTime=t._startTime+(this.rawTime()-t._startTime)/t._timeScale),t.timeline&&t.timeline._remove(t,!0),t.timeline=t._timeline=this,t._gc&&t._enabled(!0,!0),i=this._last,this._sortChildren)for(s=t._startTime;i&&i._startTime>s;)i=i._prev;return i?(t._next=i._next,i._next=t):(t._next=this._first,this._first=t),t._next?t._next._prev=t:this._last=t,t._prev=i,this._timeline&&this._uncache(!0),this},r._remove=function(t,e){return t.timeline===this&&(e||t._enabled(!1,!0),t._prev?t._prev._next=t._next:this._first===t&&(this._first=t._next),t._next?t._next._prev=t._prev:this._last===t&&(this._last=t._prev),t._next=t._prev=t.timeline=null,this._timeline&&this._uncache(!0)),this},r.render=function(t,e,i){var s,n=this._first;for(this._totalTime=this._time=this._rawPrevTime=t;n;)s=n._next,(n._active||t>=n._startTime&&!n._paused)&&(n._reversed?n.render((n._dirty?n.totalDuration():n._totalDuration)-(t-n._startTime)*n._timeScale,e,i):n.render((t-n._startTime)*n._timeScale,e,i)),n=s},r.rawTime=function(){return o||a.wake(),this._totalTime};var I=v("TweenLite",function(e,i,s){if(C.call(this,i,s),this.render=I.prototype.render,null==e)throw"Cannot tween a null target.";this.target=e="string"!=typeof e?e:I.selector(e)||e;var n,r,a,o=e.jquery||e.length&&e!==t&&e[0]&&(e[0]===t||e[0].nodeType&&e[0].style&&!e.nodeType),l=this.vars.overwrite;if(this._overwrite=l=null==l?Q[I.defaultOverwrite]:"number"==typeof l?l>>0:Q[l],(o||e instanceof Array||e.push&&m(e))&&"number"!=typeof e[0])for(this._targets=a=u(e),this._propLookup=[],this._siblings=[],n=0;a.length>n;n++)r=a[n],r?"string"!=typeof r?r.length&&r!==t&&r[0]&&(r[0]===t||r[0].nodeType&&r[0].style&&!r.nodeType)?(a.splice(n--,1),this._targets=a=a.concat(u(r))):(this._siblings[n]=$(r,this,!1),1===l&&this._siblings[n].length>1&&K(r,this,null,1,this._siblings[n])):(r=a[n--]=I.selector(r),"string"==typeof r&&a.splice(n+1,1)):a.splice(n--,1);else this._propLookup={},this._siblings=$(e,this,!1),1===l&&this._siblings.length>1&&K(e,this,null,1,this._siblings);(this.vars.immediateRender||0===i&&0===this._delay&&this.vars.immediateRender!==!1)&&(this._time=-_,this.render(-this._delay))},!0),E=function(e){return e.length&&e!==t&&e[0]&&(e[0]===t||e[0].nodeType&&e[0].style&&!e.nodeType)},z=function(t,e){var i,s={};for(i in t)G[i]||i in e&&"transform"!==i&&"x"!==i&&"y"!==i&&"width"!==i&&"height"!==i&&"className"!==i&&"border"!==i||!(!U[i]||U[i]&&U[i]._autoCSS)||(s[i]=t[i],delete t[i]);t.css=s};r=I.prototype=new C,r.constructor=I,r.kill()._gc=!1,r.ratio=0,r._firstPT=r._targets=r._overwrittenProps=r._startAt=null,r._notifyPluginsOfEnabled=r._lazy=!1,I.version="1.13.1",I.defaultEase=r._ease=new y(null,null,1,1),I.defaultOverwrite="auto",I.ticker=a,I.autoSleep=!0,I.lagSmoothing=function(t,e){a.lagSmoothing(t,e)},I.selector=t.$||t.jQuery||function(e){var i=t.$||t.jQuery;return i?(I.selector=i,i(e)):"undefined"==typeof document?e:document.querySelectorAll?document.querySelectorAll(e):document.getElementById("#"===e.charAt(0)?e.substr(1):e)};var O=[],L={},N=I._internals={isArray:m,isSelector:E,lazyTweens:O},U=I._plugins={},F=N.tweenLookup={},j=0,G=N.reservedProps={ease:1,delay:1,overwrite:1,onComplete:1,onCompleteParams:1,onCompleteScope:1,useFrames:1,runBackwards:1,startAt:1,onUpdate:1,onUpdateParams:1,onUpdateScope:1,onStart:1,onStartParams:1,onStartScope:1,onReverseComplete:1,onReverseCompleteParams:1,onReverseCompleteScope:1,onRepeat:1,onRepeatParams:1,onRepeatScope:1,easeParams:1,yoyo:1,immediateRender:1,repeat:1,repeatDelay:1,data:1,paused:1,reversed:1,autoCSS:1,lazy:1},Q={none:0,all:1,auto:2,concurrent:3,allOnStart:4,preexisting:5,"true":1,"false":0},q=C._rootFramesTimeline=new D,B=C._rootTimeline=new D,M=N.lazyRender=function(){var t=O.length;for(L={};--t>-1;)s=O[t],s&&s._lazy!==!1&&(s.render(s._lazy,!1,!0),s._lazy=!1);O.length=0};B._startTime=a.time,q._startTime=a.frame,B._active=q._active=!0,setTimeout(M,1),C._updateRoot=I.render=function(){var t,e,i;if(O.length&&M(),B.render((a.time-B._startTime)*B._timeScale,!1,!1),q.render((a.frame-q._startTime)*q._timeScale,!1,!1),O.length&&M(),!(a.frame%120)){for(i in F){for(e=F[i].tweens,t=e.length;--t>-1;)e[t]._gc&&e.splice(t,1);0===e.length&&delete F[i]}if(i=B._first,(!i||i._paused)&&I.autoSleep&&!q._first&&1===a._listeners.tick.length){for(;i&&i._paused;)i=i._next;i||a.sleep()}}},a.addEventListener("tick",C._updateRoot);var $=function(t,e,i){var s,n,r=t._gsTweenID;if(F[r||(t._gsTweenID=r="t"+j++)]||(F[r]={target:t,tweens:[]}),e&&(s=F[r].tweens,s[n=s.length]=e,i))for(;--n>-1;)s[n]===e&&s.splice(n,1);return F[r].tweens},K=function(t,e,i,s,n){var r,a,o,l;if(1===s||s>=4){for(l=n.length,r=0;l>r;r++)if((o=n[r])!==e)o._gc||o._enabled(!1,!1)&&(a=!0);else if(5===s)break;return a}var h,u=e._startTime+_,f=[],m=0,p=0===e._duration;for(r=n.length;--r>-1;)(o=n[r])===e||o._gc||o._paused||(o._timeline!==e._timeline?(h=h||H(e,0,p),0===H(o,h,p)&&(f[m++]=o)):u>=o._startTime&&o._startTime+o.totalDuration()/o._timeScale>u&&((p||!o._initted)&&2e-10>=u-o._startTime||(f[m++]=o)));for(r=m;--r>-1;)o=f[r],2===s&&o._kill(i,t)&&(a=!0),(2!==s||!o._firstPT&&o._initted)&&o._enabled(!1,!1)&&(a=!0);return a},H=function(t,e,i){for(var s=t._timeline,n=s._timeScale,r=t._startTime;s._timeline;){if(r+=s._startTime,n*=s._timeScale,s._paused)return-100;s=s._timeline}return r/=n,r>e?r-e:i&&r===e||!t._initted&&2*_>r-e?_:(r+=t.totalDuration()/t._timeScale/n)>e+_?0:r-e-_};r._init=function(){var t,e,i,s,n,r=this.vars,a=this._overwrittenProps,o=this._duration,l=!!r.immediateRender,h=r.ease;if(r.startAt){this._startAt&&(this._startAt.render(-1,!0),this._startAt.kill()),n={};for(s in r.startAt)n[s]=r.startAt[s];if(n.overwrite=!1,n.immediateRender=!0,n.lazy=l&&r.lazy!==!1,n.startAt=n.delay=null,this._startAt=I.to(this.target,0,n),l)if(this._time>0)this._startAt=null;else if(0!==o)return}else if(r.runBackwards&&0!==o)if(this._startAt)this._startAt.render(-1,!0),this._startAt.kill(),this._startAt=null;else{i={};for(s in r)G[s]&&"autoCSS"!==s||(i[s]=r[s]);if(i.overwrite=0,i.data="isFromStart",i.lazy=l&&r.lazy!==!1,i.immediateRender=l,this._startAt=I.to(this.target,0,i),l){if(0===this._time)return}else this._startAt._init(),this._startAt._enabled(!1)}if(this._ease=h=h?h instanceof y?h:"function"==typeof h?new y(h,r.easeParams):w[h]||I.defaultEase:I.defaultEase,r.easeParams instanceof Array&&h.config&&(this._ease=h.config.apply(h,r.easeParams)),this._easeType=this._ease._type,this._easePower=this._ease._power,this._firstPT=null,this._targets)for(t=this._targets.length;--t>-1;)this._initProps(this._targets[t],this._propLookup[t]={},this._siblings[t],a?a[t]:null)&&(e=!0);else e=this._initProps(this.target,this._propLookup,this._siblings,a);if(e&&I._onPluginEvent("_onInitAllProps",this),a&&(this._firstPT||"function"!=typeof this.target&&this._enabled(!1,!1)),r.runBackwards)for(i=this._firstPT;i;)i.s+=i.c,i.c=-i.c,i=i._next;this._onUpdate=r.onUpdate,this._initted=!0},r._initProps=function(e,i,s,n){var r,a,o,l,h,_;if(null==e)return!1;L[e._gsTweenID]&&M(),this.vars.css||e.style&&e!==t&&e.nodeType&&U.css&&this.vars.autoCSS!==!1&&z(this.vars,e);for(r in this.vars){if(_=this.vars[r],G[r])_&&(_ instanceof Array||_.push&&m(_))&&-1!==_.join("").indexOf("{self}")&&(this.vars[r]=_=this._swapSelfInParams(_,this));else if(U[r]&&(l=new U[r])._onInitTween(e,this.vars[r],this)){for(this._firstPT=h={_next:this._firstPT,t:l,p:"setRatio",s:0,c:1,f:!0,n:r,pg:!0,pr:l._priority},a=l._overwriteProps.length;--a>-1;)i[l._overwriteProps[a]]=this._firstPT;(l._priority||l._onInitAllProps)&&(o=!0),(l._onDisable||l._onEnable)&&(this._notifyPluginsOfEnabled=!0)}else this._firstPT=i[r]=h={_next:this._firstPT,t:e,p:r,f:"function"==typeof e[r],n:r,pg:!1,pr:0},h.s=h.f?e[r.indexOf("set")||"function"!=typeof e["get"+r.substr(3)]?r:"get"+r.substr(3)]():parseFloat(e[r]),h.c="string"==typeof _&&"="===_.charAt(1)?parseInt(_.charAt(0)+"1",10)*Number(_.substr(2)):Number(_)-h.s||0;h&&h._next&&(h._next._prev=h)}return n&&this._kill(n,e)?this._initProps(e,i,s,n):this._overwrite>1&&this._firstPT&&s.length>1&&K(e,this,i,this._overwrite,s)?(this._kill(i,e),this._initProps(e,i,s,n)):(this._firstPT&&(this.vars.lazy!==!1&&this._duration||this.vars.lazy&&!this._duration)&&(L[e._gsTweenID]=!0),o)},r.render=function(t,e,i){var s,n,r,a,o=this._time,l=this._duration,h=this._rawPrevTime;if(t>=l)this._totalTime=this._time=l,this.ratio=this._ease._calcEnd?this._ease.getRatio(1):1,this._reversed||(s=!0,n="onComplete"),0===l&&(this._initted||!this.vars.lazy||i)&&(this._startTime===this._timeline._duration&&(t=0),(0===t||0>h||h===_)&&h!==t&&(i=!0,h>_&&(n="onReverseComplete")),this._rawPrevTime=a=!e||t||h===t?t:_);else if(1e-7>t)this._totalTime=this._time=0,this.ratio=this._ease._calcEnd?this._ease.getRatio(0):0,(0!==o||0===l&&h>0&&h!==_)&&(n="onReverseComplete",s=this._reversed),0>t?(this._active=!1,0===l&&(this._initted||!this.vars.lazy||i)&&(h>=0&&(i=!0),this._rawPrevTime=a=!e||t||h===t?t:_)):this._initted||(i=!0);else if(this._totalTime=this._time=t,this._easeType){var u=t/l,f=this._easeType,m=this._easePower;(1===f||3===f&&u>=.5)&&(u=1-u),3===f&&(u*=2),1===m?u*=u:2===m?u*=u*u:3===m?u*=u*u*u:4===m&&(u*=u*u*u*u),this.ratio=1===f?1-u:2===f?u:.5>t/l?u/2:1-u/2}else this.ratio=this._ease.getRatio(t/l);if(this._time!==o||i){if(!this._initted){if(this._init(),!this._initted||this._gc)return;if(!i&&this._firstPT&&(this.vars.lazy!==!1&&this._duration||this.vars.lazy&&!this._duration))return this._time=this._totalTime=o,this._rawPrevTime=h,O.push(this),this._lazy=t,void 0;this._time&&!s?this.ratio=this._ease.getRatio(this._time/l):s&&this._ease._calcEnd&&(this.ratio=this._ease.getRatio(0===this._time?0:1))}for(this._lazy!==!1&&(this._lazy=!1),this._active||!this._paused&&this._time!==o&&t>=0&&(this._active=!0),0===o&&(this._startAt&&(t>=0?this._startAt.render(t,e,i):n||(n="_dummyGS")),this.vars.onStart&&(0!==this._time||0===l)&&(e||this.vars.onStart.apply(this.vars.onStartScope||this,this.vars.onStartParams||T))),r=this._firstPT;r;)r.f?r.t[r.p](r.c*this.ratio+r.s):r.t[r.p]=r.c*this.ratio+r.s,r=r._next;this._onUpdate&&(0>t&&this._startAt&&this._startTime&&this._startAt.render(t,e,i),e||(this._time!==o||s)&&this._onUpdate.apply(this.vars.onUpdateScope||this,this.vars.onUpdateParams||T)),n&&(!this._gc||i)&&(0>t&&this._startAt&&!this._onUpdate&&this._startTime&&this._startAt.render(t,e,i),s&&(this._timeline.autoRemoveChildren&&this._enabled(!1,!1),this._active=!1),!e&&this.vars[n]&&this.vars[n].apply(this.vars[n+"Scope"]||this,this.vars[n+"Params"]||T),0===l&&this._rawPrevTime===_&&a!==_&&(this._rawPrevTime=0))}},r._kill=function(t,e){if("all"===t&&(t=null),null==t&&(null==e||e===this.target))return this._lazy=!1,this._enabled(!1,!1);e="string"!=typeof e?e||this._targets||this.target:I.selector(e)||e;var i,s,n,r,a,o,l,h;if((m(e)||E(e))&&"number"!=typeof e[0])for(i=e.length;--i>-1;)this._kill(t,e[i])&&(o=!0);else{if(this._targets){for(i=this._targets.length;--i>-1;)if(e===this._targets[i]){a=this._propLookup[i]||{},this._overwrittenProps=this._overwrittenProps||[],s=this._overwrittenProps[i]=t?this._overwrittenProps[i]||{}:"all";break}}else{if(e!==this.target)return!1;a=this._propLookup,s=this._overwrittenProps=t?this._overwrittenProps||{}:"all"}if(a){l=t||a,h=t!==s&&"all"!==s&&t!==a&&("object"!=typeof t||!t._tempKill);for(n in l)(r=a[n])&&(r.pg&&r.t._kill(l)&&(o=!0),r.pg&&0!==r.t._overwriteProps.length||(r._prev?r._prev._next=r._next:r===this._firstPT&&(this._firstPT=r._next),r._next&&(r._next._prev=r._prev),r._next=r._prev=null),delete a[n]),h&&(s[n]=1);!this._firstPT&&this._initted&&this._enabled(!1,!1)}}return o},r.invalidate=function(){return this._notifyPluginsOfEnabled&&I._onPluginEvent("_onDisable",this),this._firstPT=null,this._overwrittenProps=null,this._onUpdate=null,this._startAt=null,this._initted=this._active=this._notifyPluginsOfEnabled=this._lazy=!1,this._propLookup=this._targets?{}:[],this},r._enabled=function(t,e){if(o||a.wake(),t&&this._gc){var i,s=this._targets;if(s)for(i=s.length;--i>-1;)this._siblings[i]=$(s[i],this,!0);else this._siblings=$(this.target,this,!0)}return C.prototype._enabled.call(this,t,e),this._notifyPluginsOfEnabled&&this._firstPT?I._onPluginEvent(t?"_onEnable":"_onDisable",this):!1},I.to=function(t,e,i){return new I(t,e,i)},I.from=function(t,e,i){return i.runBackwards=!0,i.immediateRender=0!=i.immediateRender,new I(t,e,i)},I.fromTo=function(t,e,i,s){return s.startAt=i,s.immediateRender=0!=s.immediateRender&&0!=i.immediateRender,new I(t,e,s)},I.delayedCall=function(t,e,i,s,n){return new I(e,0,{delay:t,onComplete:e,onCompleteParams:i,onCompleteScope:s,onReverseComplete:e,onReverseCompleteParams:i,onReverseCompleteScope:s,immediateRender:!1,useFrames:n,overwrite:0})},I.set=function(t,e){return new I(t,0,e)},I.getTweensOf=function(t,e){if(null==t)return[];t="string"!=typeof t?t:I.selector(t)||t;var i,s,n,r;if((m(t)||E(t))&&"number"!=typeof t[0]){for(i=t.length,s=[];--i>-1;)s=s.concat(I.getTweensOf(t[i],e));for(i=s.length;--i>-1;)for(r=s[i],n=i;--n>-1;)r===s[n]&&s.splice(i,1)}else for(s=$(t).concat(),i=s.length;--i>-1;)(s[i]._gc||e&&!s[i].isActive())&&s.splice(i,1);return s},I.killTweensOf=I.killDelayedCallsTo=function(t,e,i){"object"==typeof e&&(i=e,e=!1);for(var s=I.getTweensOf(t,e),n=s.length;--n>-1;)s[n]._kill(i,t)};var J=v("plugins.TweenPlugin",function(t,e){this._overwriteProps=(t||"").split(","),this._propName=this._overwriteProps[0],this._priority=e||0,this._super=J.prototype},!0);if(r=J.prototype,J.version="1.10.1",J.API=2,r._firstPT=null,r._addTween=function(t,e,i,s,n,r){var a,o;return null!=s&&(a="number"==typeof s||"="!==s.charAt(1)?Number(s)-i:parseInt(s.charAt(0)+"1",10)*Number(s.substr(2)))?(this._firstPT=o={_next:this._firstPT,t:t,p:e,s:i,c:a,f:"function"==typeof t[e],n:n||e,r:r},o._next&&(o._next._prev=o),o):void 0},r.setRatio=function(t){for(var e,i=this._firstPT,s=1e-6;i;)e=i.c*t+i.s,i.r?e=Math.round(e):s>e&&e>-s&&(e=0),i.f?i.t[i.p](e):i.t[i.p]=e,i=i._next},r._kill=function(t){var e,i=this._overwriteProps,s=this._firstPT;if(null!=t[this._propName])this._overwriteProps=[];else for(e=i.length;--e>-1;)null!=t[i[e]]&&i.splice(e,1);for(;s;)null!=t[s.n]&&(s._next&&(s._next._prev=s._prev),s._prev?(s._prev._next=s._next,s._prev=null):this._firstPT===s&&(this._firstPT=s._next)),s=s._next;return!1},r._roundProps=function(t,e){for(var i=this._firstPT;i;)(t[this._propName]||null!=i.n&&t[i.n.split(this._propName+"_").join("")])&&(i.r=e),i=i._next},I._onPluginEvent=function(t,e){var i,s,n,r,a,o=e._firstPT;if("_onInitAllProps"===t){for(;o;){for(a=o._next,s=n;s&&s.pr>o.pr;)s=s._next;(o._prev=s?s._prev:r)?o._prev._next=o:n=o,(o._next=s)?s._prev=o:r=o,o=a}o=e._firstPT=n}for(;o;)o.pg&&"function"==typeof o.t[t]&&o.t[t]()&&(i=!0),o=o._next;return i},J.activate=function(t){for(var e=t.length;--e>-1;)t[e].API===J.API&&(U[(new t[e])._propName]=t[e]);return!0},d.plugin=function(t){if(!(t&&t.propName&&t.init&&t.API))throw"illegal plugin definition.";var e,i=t.propName,s=t.priority||0,n=t.overwriteProps,r={init:"_onInitTween",set:"setRatio",kill:"_kill",round:"_roundProps",initAll:"_onInitAllProps"},a=v("plugins."+i.charAt(0).toUpperCase()+i.substr(1)+"Plugin",function(){J.call(this,i,s),this._overwriteProps=n||[]},t.global===!0),o=a.prototype=new J(i);o.constructor=a,a.API=t.API;for(e in r)"function"==typeof t[e]&&(o[r[e]]=t[e]);return a.version=t.version,J.activate([a]),a},s=t._gsQueue){for(n=0;s.length>n;n++)s[n]();for(r in p)p[r].func||t.console.log("GSAP encountered missing dependency: com.greensock."+r)}o=!1}})("undefined"!=typeof module&&module.exports&&"undefined"!=typeof global?global:this||window,"TweenLite");
$( function() {

    var width, height, canvas, ctx, points, target, animateHeader = true;

    // Main
    initHeader();
    initAnimation();
    addListeners();

    function initHeader() {
        width = window.innerWidth;
        height = window.innerHeight;
        target = {
            x: width / 2,
            y: height / 3
        };

        canvas = document.getElementById( 'spiders' );
        canvas.width = width;
        canvas.height = height;
        ctx = canvas.getContext( '2d' );

        // create points
        points = [];
        for ( var x = 0; x < width; x = x + width / 20 ) {
            for ( var y = 0; y < height; y = y + height / 20 ) {
                var px = x + Math.random() * width / 20;
                var py = y + Math.random() * height / 20;
                var p = {
                    x: px,
                    originX: px,
                    y: py,
                    originY: py
                };
                points.push( p );
            }
        }

        // for each point find the 5 closest points
        for ( var i = 0; i < points.length; i++ ) {
            var closest = [];
            var p1 = points[ i ];
            for ( var j = 0; j < points.length; j++ ) {
                var p2 = points[ j ]
                if ( !( p1 == p2 ) ) {
                    var placed = false;
                    for ( var k = 0; k < 5; k++ ) {
                        if ( !placed ) {
                            if ( closest[ k ] == undefined ) {
                                closest[ k ] = p2;
                                placed = true;
                            }
                        }
                    }

                    for ( var k = 0; k < 5; k++ ) {
                        if ( !placed ) {
                            if ( getDistance( p1, p2 ) < getDistance( p1, closest[ k ] ) ) {
                                closest[ k ] = p2;
                                placed = true;
                            }
                        }
                    }
                }
            }
            p1.closest = closest;
        }

        // assign a circle to each point
        for ( var i in points ) {
            var c = new Circle( points[ i ], 2 + Math.random() * 2, 'rgba(255,255,255,0.3)' );
            points[ i ].circle = c;
        }
    }

    // Event handling
    function addListeners() {
        if ( !( 'ontouchstart' in window ) ) {
            window.addEventListener( 'mousemove', mouseMove );
        }
        window.addEventListener( 'scroll', scrollCheck );
        window.addEventListener( 'resize', resize );
    }

    function mouseMove( e ) {
        var posx = posy = 0;
        if ( e.pageX || e.pageY ) {
            posx = e.pageX;
            posy = e.pageY;
        } else if ( e.clientX || e.clientY ) {
            posx = e.clientX + document.body.scrollLeft + document.documentElement.scrollLeft;
            posy = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
        }
        target.x = posx;
        target.y = posy;
    }

    function scrollCheck() {
        if ( document.body.scrollTop > height ) animateHeader = false;
        else animateHeader = true;
    }

    function resize() {
        width = window.innerWidth;
        height = window.innerHeight;
        canvas.width = width;
        canvas.height = height;
    }

    // animation
    function initAnimation() {
        animate();
        for ( var i in points ) {
            shiftPoint( points[ i ] );
        }
    }

    function animate() {
        if ( animateHeader ) {
            ctx.clearRect( 0, 0, width, height );
            for ( var i in points ) {
                // detect points in range
                if ( Math.abs( getDistance( target, points[ i ] ) ) < 2000 ) {
                    points[ i ].active = 0.2;
                    points[ i ].circle.active = 0.5;
                } else if ( Math.abs( getDistance( target, points[ i ] ) ) < 20000 ) {
                    points[ i ].active = 0.1;
                    points[ i ].circle.active = 0.3;
                } else if ( Math.abs( getDistance( target, points[ i ] ) ) < 70000 ) {
                    points[ i ].active = 0.02;
                    points[ i ].circle.active = 0.09;
                } else if ( Math.abs( getDistance( target, points[ i ] ) ) < 140000 ) {
                    points[ i ].active = 0;
                    points[ i ].circle.active = 0.02;
                } else {
                    points[ i ].active = 0;
                    points[ i ].circle.active = 0;
                }

                drawLines( points[ i ] );
                points[ i ].circle.draw();
            }
        }
        requestAnimationFrame( animate );
    }

    function shiftPoint( p ) {
        TweenLite.to( p, 1 + 1 * Math.random(), {
            x: p.originX - 50 + Math.random() * 100,
            y: p.originY - 50 + Math.random() * 100,
            onComplete: function() {
                shiftPoint( p );
            }
        } );
    }

    // Canvas manipulation
    function drawLines( p ) {
        if ( !p.active ) return;
        for ( var i in p.closest ) {
            ctx.beginPath();
            ctx.moveTo( p.x, p.y );
            ctx.lineTo( p.closest[ i ].x, p.closest[ i ].y );
            ctx.strokeStyle = 'rgba(255,255,255,' + p.active + ')';
            ctx.stroke();
        }
    }

    function Circle( pos, rad, color ) {
        var _this = this;

        // constructor
        ( function() {
            _this.pos = pos || null;
            _this.radius = rad || null;
            _this.color = color || null;
        } )();

        this.draw = function() {
            if ( !_this.active ) return;
            ctx.beginPath();
            ctx.arc( _this.pos.x, _this.pos.y, _this.radius, 0, 2 * Math.PI, false );
            ctx.fillStyle = 'rgba(255,255,255,' + _this.active + ')';
            ctx.fill();
        };
    }

    // Util
    function getDistance( p1, p2 ) {
        return Math.pow( p1.x - p2.x, 2 ) + Math.pow( p1.y - p2.y, 2 );
    }

} );

              
            
!
999px

Console