A Pen By
Antonis Kamamis

` ````
<canvas></canvas>
```

` ````
*{margin:0;padding:0;}body{background:#222;}
canvas{
position:absolute;
border:5px solid rgba(255,255,255,0.1);
box-shadow:inset 0 0 100px #4162a9;
transform:translateZ(0);
}
```

` ````
var canvas = document.querySelector('canvas'),
ctx = canvas.getContext('2d'),
particles = [],
patriclesNum = 500,
w = 500,
h = 500,
colors = ['#f35d4f','#f36849','#c0d988','#6ddaf1','#f1e85b'];
canvas.width = 500;
canvas.height = 500;
canvas.style.left = (window.innerWidth - 500)/2+'px';
if(window.innerHeight>500)
canvas.style.top = (window.innerHeight - 500)/2+'px';
function Factory(){
this.x = Math.round( Math.random() * w);
this.y = Math.round( Math.random() * h);
this.rad = Math.round( Math.random() * 1) + 1;
this.rgba = colors[ Math.round( Math.random() * 3) ];
this.vx = Math.round( Math.random() * 3) - 1.5;
this.vy = Math.round( Math.random() * 3) - 1.5;
}
function draw(){
ctx.clearRect(0, 0, w, h);
ctx.globalCompositeOperation = 'lighter';
for(var i = 0;i < patriclesNum; i++){
var temp = particles[i];
var factor = 1;
for(var j = 0; j<patriclesNum; j++){
var temp2 = particles[j];
ctx.linewidth = 0.5;
if(temp.rgba == temp2.rgba && findDistance(temp, temp2)<50){
ctx.strokeStyle = temp.rgba;
ctx.beginPath();
ctx.moveTo(temp.x, temp.y);
ctx.lineTo(temp2.x, temp2.y);
ctx.stroke();
factor++;
}
}
ctx.fillStyle = temp.rgba;
ctx.strokeStyle = temp.rgba;
ctx.beginPath();
ctx.arc(temp.x, temp.y, temp.rad*factor, 0, Math.PI*2, true);
ctx.fill();
ctx.closePath();
ctx.beginPath();
ctx.arc(temp.x, temp.y, (temp.rad+5)*factor, 0, Math.PI*2, true);
ctx.stroke();
ctx.closePath();
temp.x += temp.vx;
temp.y += temp.vy;
if(temp.x > w)temp.x = 0;
if(temp.x < 0)temp.x = w;
if(temp.y > h)temp.y = 0;
if(temp.y < 0)temp.y = h;
}
}
function findDistance(p1,p2){
return Math.sqrt( Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2) );
}
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
(function init(){
for(var i = 0; i < patriclesNum; i++){
particles.push(new Factory);
}
})();
(function loop(){
draw();
requestAnimFrame(loop);
})();
```

999px

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