I'm loving abusing this! The only problem is there are too many people trying their scripts at the same time, but it's really cool you left it completely hackable!

  for (i=0;i<60;i++) { for (j=0;j<60;j++) { firebaseCanvasData.child(i+':'+j).set("rgb("+(255-i*2)+","+(255-j)+","+(i*j)+")") }}

Edit: Ok, definitely too many people abusing it...

Thanks, the fact that it was so simple to make it do random things is great. Very fun.

Cool! For me, reducing the pixelSpacing to 0 really helped make it more artistic.