JS1k: The JavaScript code golfing competition

d=document;function f(){var b=e;i=4*(x+y*b.width);j=255;b.data[i+0]=j;b.data[i+3]=j}var g=0,h=0,k,m,n,r=0,s;l=c.width=16;o=c.height=16;M=Math;p=Math.PI;R=M.random;L=M.floor;
setInterval(function(){a.fillStyle=n?"red":"white";a.fillRect(0,0,l,o);a.fillStyle="pink";a.font="bold 10px verdana";a.textAlign="center";a.fillText(r,8,12);s?g--:g++;if(!s&&g>2*h||s&&g<=0-h)n=m=0,h=L(R()*l+l),g=(s=L(2*R()))?h:0;var b=2*(g/h)*p,q=-15+15*b/p,b=5+5*M.sin(b);k&&0.3>=b&&!n&&!m?(m=!0,r++):k&&!m&&(n=!0,r=0);if(m){var t=q-1,u=b-2;e=a.createImageData(3,3);for(y=3;y--;)for(x=3;x--;)(1==y||0==y&&1==x||2==y&&1==x)&&f();a.putImageData(e,t,u);q+=1;b+=1;e=a.createImageData(3,4);for(y=4;y--;)for(x=
3;x--;)(0==y&&1==x||1==y&&0<x||2==y&&2>x||3==y&&0==x)&&f()}else{e=a.createImageData(5,4);for(y=4;y--;)for(x=5;x--;)(1==y||0==y&&(1==x||3==x)||2==y&&0<x&&4>x||3==y&&2==x)&&f()}a.putImageData(e,q,b)},50);d.onkeypress=function(b){32==b.charCode&&(k=!0)};d.onkeyup=function(){k=!1};

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