JS1k: The JavaScript code golfing competition

c.width=1000;c.height=1000;e=a.getImageData(0,0,1000,1000);d=e.data;k=1000;n=5;onkeydown=onkeyup=function(z){z=z.keyCode;k*=z==38?10:z==40?0.1:1;n+=z==37?-1:z==39?1:0;n=n<0?0:n;};g=120;l=120;m=Math;r=120;x=500;y=500;setInterval('j=k;while(j>0){i=m.random();if(i<0.25){x--;}else if(i<0.5){y--;}else if(i<0.75){x++;}else{y++;}i=m.random();if(i<0.166){r-=n;}else if(i<0.333){r+=n;}else if(i<0.5){g-=n;}else if(i<0.666){g+=n;}else if(i<0.833){l-=n;}else{l+=n;}if(x>999){x=0;}if(y>999){y=0;}if(x<0){x=999;}if(y<0){y=999;}if(r>255){r=255;}if(g>255){g=255;}if(l>255){l=255;}if(r<0){r=0;}if(g<0){g=0;}if(l<0){l=0;}d[(y*4000)+(x*4)]=r;d[(y*4000)+(x*4)+1]=g;d[(y*4000)+(x*4)+2]=l;d[(y*4000)+(x*4)+3]=255;j--;}e.data=d;a.putImageData(e,0,0);',1);

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