var f=document,i=Math,j=parseInt,k=f.body,d=window.innerWidth,c=f.getElementById("c");c.focus();var g=c.getContext("2d");c.width=d;k.style.margin=0;g.fillText("Arrow up",10,10);c=new Image;c.src="data:;base64,R0lGODlhDAAYAJEAAP///617AP85AP+lQiH/C05FVFNDQVBFMi4wAwEAAAAh+QQICwAAACwAAAAADAAYAAACTIQtKXeaw5AaMIYwcD246+1RInSJ12mUJsqNVKRcCwDKF12dQaIC+i7YYXw6XvAHHAgyOIojYRg9Z6LpIsB5soQOpJHnjXCw4nHZUAAAIfkECA8AAAAsAAAAAAwAGAAAAkeEj6lr4urigLGKE/IIY6LOdaIRhqJnblmGpF3rjImQ0UpAr8JL5quM85kOkVWIWMTNLBeAjnl5OmpRKi1CYmG02m2AdDMWAAAh+QQECwAAACwAAAAADAAYAAACRYSPacKizcaDDYUwsLQ56315QzcC4Xilx+ddSFM+l+BaKRMkaVDZabz6ARe0D+PQMDqION4R2axBdwpAtKrK6VTYnRZQAAA7";
var b=c.style;b.position="absolute";k.appendChild(c);var h=0;b.left=b.top="120px";g.fillRect(0,145,d,5);var l={},m=0;setInterval(function(){if(m++%500==0){var a=i.round(i.random()*d)+200;g.fillRect(a,50,5,100);l[a]=b}a=j(b.top)+h;var e=j(b.left)+1;h+=0.06;if(a>=10&&a<120)b.top=a+"px";if(e==d-12||l[e+12]&&a>50)e=0;b.left=e+"px"},9);f.onkeydown=function(a){if(a.keyCode==38)h=-3}
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
Original source not submitted