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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <canvas id="myCanvas"></canvas>

<div id="top">
    <div class="inner">
        
        
        <h1>Draw!</h1>
        
         <select class="float-right">
          <option value="1">Circles</option>
          <option value="2">Fan</option>
          <option value="3">Wash</option>
          <option value="4">Outline</option>
          <option value="5">Walk</option>
          <option value="6">Spiral</option>
          <option value="7">Cloud</option>
        </select>
        
 <!-- <button type="button" class="btn float-right pad-left active" data-toggle="button" id="mybtn-vs">Size</button>

    <button type="button" class="btn float-right pad-left active" data-toggle="button" id="mybtn-vc">Color</button>
        
        <div class="float-right label">vary:</div> -->
       




        

  
</div>
    
<div id="bottom">
        <div class="inner">


    <div class="btn-group" data-toggle="buttons-radio">
        <button type="button" class="btn btn-inverse active" id="mybtn-bla">&nbsp;</button>
  <button type="button" class="btn btn-danger" id="mybtn-re">&nbsp;</button>
  <button type="button" class="btn btn-success" id="mybtn-gr">&nbsp;</button>
  <button type="button" class="btn btn-info" id="mybtn-bl">&nbsp;</button>
        <button type="button" class="btn" id="mybtn-wh">&nbsp;</button>
</div>        
            
<div class="btn-group float-right" data-toggle="buttons-radio">
  <button type="button" class="btn btn-b-txt" id="mybtn-b">&#9679;</button>
  <button type="button" class="btn btn-m-txt active" id="mybtn-m">&#9679;</button>
  <button type="button" class="btn btn-s-txt" id="mybtn-s">&#9679;</button>
</div>
            
    </div>
</div>
            
          
!
            
              #myCanvas {
    position:absolute;
    top:0;
    left:0;
    z-index:-10;
    cursor:crosshair;
}

#top, #bottom{
    position:fixed;
    background-color:#fbfbfb;

    width:100%;
    
}

#top{
    top:0px;
    box-shadow: inset 0px -10px 20px -15px #000;
}

#bottom {
    bottom:0px;
    box-shadow: inset 0px 10px 20px -15px #000;
}

#middle{
    position:fixed;
    height:100%;
    padding-top:40px;
    padding-bottom:40px;
}

.inner{

width: 300px;
  display: block;
  margin-left: auto;
  margin-right: auto;
    padding:10px;

}

h1{
    font-size:23px;
    font-weight:200;
    line-height:30px;
    display:inline-block;
    color:#555;
    
}


p{
    padding-bottom:20px;
}

.btn-b-txt{
    font-size:35px !important;
    line-height:16px;
    padding-bottom:8px;
}

.btn-m-txt{
    font-size:20px !important;
}

.btn-s-txt{
    font-size:8px !important;
}

.float-right{
    float:right;
    display:inline-block;    
}

.pad-left{
    margin-left:5px;
}

.label{
    margin-top:4px;
}

.btn-inverse:active, .btn-inverse.active{
    background-color:#444;
   
}


/* responsive adjustments */
@media only screen and (min-width: 450px) {
	.inner{
	    width:95%;
    }    
}

/* responsive adjustments */
@media only screen and (min-width: 600px) {
	.inner{
	    width:80%;
    }    
}

@media only screen and (min-width: 920px) {
	.inner{
	    width:750px;
    }    
}


            
          
!
            
              window.requestAnimFrame = (function () {
    return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function ( /* function */ callback, /* DOMElement */ element) {
        window.setTimeout(callback, 1000 / 4);
    };
})();

var randWalkX, randWalkY, randWalkXV, randWalkYV, startN;
randWalkX = randWalkY = randWalkXV = randWalkYV = 0;
var startLoc = [0,0];
var canvas, context, mouseDown, size, color, v_color, v_size;
v_color = v_size = 1;
size = 7; //3,7,12
color = new Array(20,20,20);
//black (20,20,20)
//red (150,20,20)
//green (20,120,50)
//blue (20,50,120)
//white (230,230,230)

var colors = [[20,20,20],[150,20,20],[20,120,50],[20,50,120],[230,230,230]];

$('head').append('<meta name="viewport" content="width=device-width, initial-scale=1" />');

Init();
animate();

function Init() {
    canvas = document.getElementById("myCanvas");
    canvas.addEventListener('mousedown', startTracking, false);
    canvas.addEventListener('mouseup', stopTracking, false);
    context = canvas.getContext('2d');
    document.body.appendChild(canvas);
    ResizeF(); 
}

function animate() {
    requestAnimFrame(animate);
    Draw();
}

function Draw() {
    //context.clearRect(0, 0, w, h); 
    
    if (mouseDown) {
        if (startD){
            startN = 0;
            startLoc = [mouseX,mouseY];
            startD = false;
        }
        startN++;
       //var n = parseInt($("select").val());
        switch( parseInt($("select").val()) ){
            case 1: Draw0(); break;
            case 2: Draw1(); break;
            case 3: Draw3(); break;
            case 4: Draw4(); break;
            case 5: Draw2(); break;
            case 6: draw_spiral(startLoc[0], startLoc[1], mouseX, mouseY, startN); break;
            case 7: draw_cloud(); break; 
            default:

        }

        mouseDown = false;
    }

}

function ResizeF() {
    w = window.innerWidth;
    h = window.innerHeight;
    canvas.width = w;
    canvas.height = h;
    scalar = Math.min(w, h);
    DrawBG();
}

function DrawBG() {
    
      context.rect(0, 20, canvas.width, canvas.height-40);

      // create radial gradient
      var grd2 = context.createRadialGradient(0, 0, 10, 238, 50, scalar*1.5);
      // light blue
      var tc1 = [MyRange(0,30),MyRange(0,30),MyRange(0,30)];
      var tc2 = [MyRange(0,30),MyRange(0,30),MyRange(0,30)];
      grd2.addColorStop(0, ColorBuilder(225+tc1[0],225+tc1[1],225+tc1[2],1));
      // dark blue
      grd2.addColorStop(1, ColorBuilder(225+tc2[0],225+tc2[1],225+tc2[2],1));

      context.fillStyle = grd2;
      context.fill();
    
     
}

function Draw3(){
    context.beginPath();
    tt = scalar/400;
    tempR = (Math.random()-.5)*v_size*size*tt+size*tt;
    context.arc(mouseX, mouseY, tempR*10, 0, 2 * Math.PI, false);
    tC = MyRange(0,40)*v_color;
    
     // create radial gradient
      var grd = context.createRadialGradient(mouseX, mouseY, 0, mouseX, mouseY, tempR*10);

      grd.addColorStop(0,ColorBuilder(color[0]-30, color[1]-30, color[2]-30,.1));
    

      grd.addColorStop(1,ColorBuilder(color[0], color[1]+90, color[2]+90,0));
    
    context.fillStyle = grd;
    
    context.closePath();
    context.fill();
}

function Draw2(){

    randWalkX=0; randWalkY=0; randWalkXV=0; randWalkYV=0;
    for(var i=0;i<100;i++){
    
    context.beginPath();
    tt = scalar/400;

    randWalkXV+=Math.random()-.5;
    randWalkYV+=Math.random()-.5;
    
    randWalkX+=randWalkXV;
    randWalkY+=randWalkYV;
        
    context.arc(mouseX+randWalkX, mouseY+randWalkY,.1*tt*size, 0, 2 * Math.PI, false);
        
    tC = MyRange(0,40)*v_color;
    context.fillStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, (1-(i/100))*.6+.2*Math.random());
    context.shadowBlur=6*size*tt;
    context.shadowColor=ColorBuilder(color[0],color[1],color[2],.5);
    context.closePath();
    context.fill();
        
            if ((mouseX+randWalkX<0)||(mouseX+randWalkX>w)||(mouseY+randWalkY>h)||(mouseY+randWalkY<0)){
        randWalkX=0; randWalkY=0; randWalkXV=0; randWalkYV=0;
        i=51;
    }
        
    }

}

function draw_spiral(xc, yc, xm, ym, startN){
    
    tC = MyRange(0,40)*v_color;
    

    
    for (var i=startN-1;i<startN;i+=.05){
    
        x = Math.sin(i)*i*scalar/250;// + rand(-1,1)*i*.005;
        y = Math.cos(i)*i*scalar/250;// + rand(-1,1)*i*.005;       
        context.beginPath();
        context.arc(xc + x + xm/10, yc + y +ym/10, size*scalar/2000, 0, 2 * Math.PI, false);
        context.fillStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, (1-(i/200))*.3+.1*Math.random());
        //context.shadowBlur=3;
        //context.shadowColor="#000000";
        context.closePath();
        context.fill();
        
    }
}

function Draw1(){

    tt = scalar/400;
    tC = MyRange(0,40)*v_color;
    context.beginPath();
      context.moveTo(startLoc[0], startLoc[1]);
      context.lineTo(mouseX, mouseY);
     context.strokeStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, .5+Math.random()*v_color*.45+(1-v_color)*.5);
     context.shadowBlur=3*size*tt;
    context.shadowColor=ColorBuilder(color[0],color[1],color[2],.4);
    context.lineWidth = size*tt/3;
      context.stroke();

}

function Draw0(){
    context.beginPath();
    tt = scalar/400;
    context.arc(mouseX, mouseY, (Math.random()-.5)*v_size*size*tt+size*tt, 0, 2 * Math.PI, false);
    tC = MyRange(0,40)*v_color;
    context.fillStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, .5+Math.random()*v_color*.45+(1-v_color)*.5);
    context.shadowBlur=6*size*tt;
    context.shadowColor=ColorBuilder(color[0],color[1],color[2],.5);
    context.closePath();
    context.fill();
}

function draw_cloud(){
    

    
    for (var i=0;i<600;i++){
    
    xx = rand(-1,1)*scalar/1;
    yy = rand(-1,1)*scalar/2;
        
        context.beginPath();
        tt = scalar/400;
        context.arc(mouseX + xx, mouseY + yy, (Math.random()-.5)*v_size*size*tt+size*tt, 0, 2 * Math.PI, false);
        tC = MyRange(0,40)*v_color;
        context.fillStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, .1*(2*4/(Math.sqrt(xx*xx+yy*yy)))+Math.random()*v_color*.0001);
        context.shadowBlur=0*size*tt;
        context.shadowColor=ColorBuilder(color[0],color[1],color[2],.5);
        context.closePath();
        context.fill();
        
    }
}


function Draw4(){
    context.beginPath();
    tt = scalar/400;
    context.arc(mouseX, mouseY, (Math.random()-.5)*v_size*size*tt+size*tt, 0, 2 * Math.PI, false);
    tC = MyRange(0,40)*v_color;
    context.strokeStyle = ColorBuilder(color[0]+tC, color[1]+tC, color[2]+tC, .5+Math.random()*v_color*.45+(1-v_color)*.5);
    context.shadowBlur=6*size*tt;
    context.shadowColor=ColorBuilder(color[0],color[1],color[2],.5);
    context.closePath();
    context.stroke();
}

////currently using jQuery to check for browser resize
var resizeTimer;
$(window).resize(function () {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(ResizeF, 100);
});

function MyRange(min, max) { //my own random.range function
    return (Math.floor(Math.random() * (max - min + 1)) + min);
}

function startTracking(e){
    //do i need mouseX set here?
    startD = true;
    event.preventDefault();
    canvas.addEventListener('mousemove', getMouseLoc, false);
}

function stopTracking(e){
	canvas.removeEventListener('mousemove', getMouseLoc, false);
}

function getMouseLoc(ev) {
    mouseDown = true;
    mouseX = ev.pageX;
    mouseY = ev.pageY;
}

function ColorBuilder(r, g, b, o) {
    return "rgba(" + r + "," + g + "," + b + "," + o + ")";
}

//so this disables scrolling on ios which is nice...
//but how can i use touch events for drawing now instead?
//i need to research the various touch events
$(document).on('touchmove', function(e) {
    //e.preventDefault();
});

$("#mybtn-b").click(function(){size=12;})
$("#mybtn-m").click(function(){size=7;})
$("#mybtn-s").click(function(){size=3;})

$("#mybtn-bla").click(function(){color=colors[0];})
$("#mybtn-re").click(function(){color=colors[1];})
$("#mybtn-gr").click(function(){color=colors[2];})
$("#mybtn-bl").click(function(){color=colors[3];})
$("#mybtn-wh").click(function(){color=colors[4];})

$("#mybtn-vc").click(function(){
    if (v_color==1){
        v_color=0;
    }else{
        v_color=1;
    }
})
$("#mybtn-vs").click(function(){
    if (v_size==1){
        v_size=0;
    }else{
        v_size=1;
    }
})

function rand(min, max){
    return Math.random() * (max - min) + min;
}
            
          
!
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