This is really awesome (original) (raw)
http://lab.andre-michelle.com/tonematrix
Go ahead - start clicking on the grid :) You can drag your mouse as well.
Edit: I just realized - you can c+p other people's stuff in! You have to right click to paste. So copy this string: 0,0,0,896,3136,4128,8288,16576,16576,8288,4128,3136,896,0,0,0
Go on, try it out :)
Or how about this one: 73730,640,74244,128,81936,2,4,8,69890,4,8,73970,0,0,65544,4
It reminds me a lot of this game.
bouncy