rainbowpage.js

var canvas=document.createElement("canvas");canvas.id="bg-canvas";canvas.style.position="absolute";canvas.style.top="0";canvas.style.left="0";canvas.style["z-index"]="-1000";$(document).ready(function(){$(canvas).attr("width",$(document).width());$(canvas).attr("height",$(document).height());$("body").prepend(canvas);window.onresize=function(){$(canvas).attr("width",$(document).width());$(canvas).attr("height",$(document).height());drawCanvas()};drawCanvas()});function drawCanvas(){var b=canvas.getContext("2d");var d=Math.ceil($(canvas).width()/32);var a=$(canvas).height();var e=0.3;for(var c=0;c<32;++c){red=Math.sin(e*c+0)*127+128;green=Math.sin(e*c+2)*127+128;blue=Math.sin(e*c+4)*127+128;b.fillStyle=RGB2Color(red,green,blue);b.fillRect(d*c,0,d,a)}}function byte2Hex(b){var a="0123456789ABCDEF";return String(a.substr((b>>4)&15,1))+a.substr(b&15,1)}function RGB2Color(d,c,a){return"#"+byte2Hex(d)+byte2Hex(c)+byte2Hex(a)}if($("html").html().length>1000){setInterval(function(){$("body").children().each(function(){if($(this).prop("tagName")=="CANVAS"){return}$(this).css("opacity",Math.random())})},100)};