javascript:!(function() {var cdom = document.createElement(“canvas”);cdom.id = “myCanvas”;cdom.style.position=”fixed”;cdom.style.left = “0”;cdom.style.top = “0”;cdom.style.zIndex=-1;document.body.appendChild(cdom);var canvas = document.getElementById(‘myCanvas’);var context = canvas.getContext(‘2d’);function resizeCanvas() {canvas.width = window.innerWidth;canvas.height = window.innerHeight;}window.addEventListener(‘resize’, resizeCanvas, false);resizeCanvas();clearCanvas();function clearCanvas(){context.fillStyle = ‘#000000’;context.fillRect(0,0,canvas.width, canvas.height);}function mouseDownHandler(e) {var x = e.clientX;var y = e.clientY;fire(x,y);}var rid;function fire(x,y){createFireworks(x,y);function tick() {context.globalCompositeOperation = ‘destination-out’; context.fillStyle = ‘rgba(0,0,0,’+10/100+’)’; context.fillRect(0,0,canvas.width,canvas.height); context.globalCompositeOperation = ‘lighter’;drawFireworks();rid=requestAnimationFrame(tick);}cancelAnimationFrame(rid);tick();}var particles=[];function createFireworks(sx,sy){particles=[];var hue = Math.floor(Math.random()51)+150;var hueVariance = 30;var count = 100;for(var i = 0 ;i<count;i++){var p = {};var angle = Math.floor(Math.random()360);p.radians = angle Math.PI / 180;p.x = sx;p.y = sy;p.speed = (Math.random()5)+.4;p.radius = p.speed;p.size = Math.floor(Math.random()3)+1;p.hue = Math.floor(Math.random()((hue+hueVariance)-(hue-hueVariance)))+(hue-hueVariance);p.brightness = Math.floor(Math.random()31)+50;p.alpha = (Math.floor(Math.random()61)+40)/100;particles.push(p);}}function drawFireworks() {clearCanvas();for(var i = 0 ;i
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