JS1k: The JavaScript code golfing competition

q=new BlobBuilder;q.append("n=1;function s(a){p=postMessage;j=0;a:for(;j<a;){++n;for(i=2;i<n;++i)if(n%i==0)continue a;p(n);++j}p(0)}onmessage=function(a){s(a.data)};");w=new Worker(webkitURL.createObjectURL(q.getBlob()));w.l=w.postMessage;p=1;s=t=r=0;u=1;n=Math.floor;c.width=c.height=640;onkeyup=function(b){b.which==32&&(u=!u)&&w.l(99)};o=n(new Date/99);
setInterval(function(){v=n(new Date/99)-o;v>0&&(s=t*10/v,t=0);o+=v;a.r=a.fillRect;a.t=a.fillText;a.r(0,0,640,400);a.fillStyle="#0d0";for(i=2;i<638;i+=2)i>59&&i<581?a.r(i,230,2,9):a.r(i,140,2,99),a.r(i,40+2*n(4*Math.sin((r+i)/99)),2,9);a.fillStyle=a.strokeStyle="#fff";a.font="64pt monospace";a.t("π",600,110);a.r(2,239,636,131);a.font="18pt monospace";a.textBaseline="middle";a.textAlign="center";a.t("Prime: "+p,320,185);a.t("Press SPACE to pause",320,385);a.fillStyle="#000";a.t("Speed (pps): "+
n(s),320,290);a.t("Primes traveled: "+r,320,320);a.lineWidth=4;a.strokeRect(65,145,512,80)},9);w.onmessage=function(b){x=b.data;x>0?(p=x,++r,++t):u&&w.l(99)};w.l(99);

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