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CSS Base

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              window.requestAnimFrame = (function(){
  return window.requestAnimationFrame || 
      window.webkitRequestAnimationFrame || 
      window.mozRequestAnimationFrame || 
      window.oRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
        function(callback){
          window.setTimeout(callback, 1000 / 30);
        };
})();

setTimeout(app, 1500);

function app() {
  var canvas = document.getElementsByTagName("canvas")[0];
  
  if (canvas.getContext) {
    var ctx = canvas.getContext("2d"),
        baseDim = 1500,
        cubes = 13,
				speed = 1,
        newDim = baseDim;

    function drawScreen() {
      var w = window.innerWidth,
          h = window.innerHeight,
          s = 2;
    
      // adjust canvas to be retina-friendly
      canvas.width = w * s;
      canvas.height = h * s;
      canvas.style.width = w + "px";
      canvas.style.height = h + "px";
      ctx.scale(s,s);
      
      // slightly increase cube dimensions
      newDim *= 1 + (speed * 0.01);
      if (newDim >= baseDim * 4) {
        newDim = baseDim;
      }
      
      ctx.clearRect(0,0,w,h);
      
      var cube = function(x,y,d,flipped) {
          var f = flipped == true ? -1 : 1,
              color = ["#fff", "#aaa", "#d5d5d5"],
              dHalved = d/2,
              triH = Math.sqrt(3)/2,
              
              side = function(color, pts) {
                this.color = color;
                // ensure pts is an array
                if (Array.isArray(pts)) {
                  this.pt = [];

                  for (var p = 0; p < pts.length; ++p) {
                    this.pt[p] = pts[p];
                  }
                } else {
                  // if not, use pts as is 
                  this.pt = pts;
                }
              },
              sides = [
                // top
                new side(
                  color[0], 
                  [
                    [x,y],
                    [x-(d*triH),y-(f*(dHalved))],
                    [x,y-(f*(d))],
                    [x+(d*triH),y-(f*(dHalved))]
                  ]
                ),
                // left
                new side(
                  (flipped == true ? color[1] : color[2]),
                  [
                    [x,y],
                    [x-(d*triH),y-(f*(dHalved))],
                    [x-(d*triH),y+(f*(dHalved))],
                    [x,y+(f*d)]
                  ]
                ),
                // right
                new side(
                  (flipped == true ? color[2] : color[1]),
                  [
                    [x,y],
                    [x+(d*triH),y-(f*(dHalved))],
                    [x+(d*triH),y+(f*(dHalved))],
                    [x,y+(f*d)]
                  ]
                )
              ],
              // this will do nothing rather than produce errors if improper arguments are used
              drawSide = function(side) {
                if (typeof side === "object") {
                  var invalid = false;
                  
                  // validate set of points and move point
                  if (Array.isArray(side.pt) && Array.isArray(side.pt[0])) {
                      ctx.fillStyle = side.color;
                      ctx.beginPath();
                      ctx.moveTo(side.pt[0][0], side.pt[0][1]);
                      
                      // validate rest of points
                      for (var p = 1; p < side.pt.length; ++p) {
                        if (Array.isArray(side.pt[p])) {
                          ctx.lineTo(side.pt[p][0],side.pt[p][1]);

                          // back to move point
                          if (p == side.pt.length - 1) {
                            ctx.lineTo(side.pt[0][0], side.pt[0][1]);
                          }
                        } else {
                          // close path and stop loop immediately if loop encounters invalid point
                          invalid = true;
                          ctx.closePath();
                          break;
                        }
                      }
                    
                  } else {
                    invalid = true;
                  }
                  
                  if (invalid == false) {
                    ctx.fill();
                    ctx.closePath();
                  }
                }
              };
          
          // render sides
          for (var s = 0; s < sides.length; ++s) {
            drawSide(sides[s]);
          }
      };
      
      // render cubes
      for (var i = 0; i < cubes; ++i) {
          cube(w/2,h/2,(newDim / Math.pow(2,i)),(i % 2 == 0 ? true : false));
      }
		}
    
    drawScreen();

		(function animLoop(){
      requestAnimFrame(animLoop);
      drawScreen();
    })();	
  }
}
            
          
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