Use the mouse to draw whatever you want. C to clear. Press 1-7 and 0 for effects. The function of each button is listed as follows: 2,7 -Turn effect on/off 1,3,5,6 -Toggle effect (on/off function but with multiple 'on' settings) 4 -Trigger effect as long as it is held If you have any problems or confusion, you can press Q to see all variables.
Edits: 5/23/14 - 5, 6, 7, 0 functions added, but 7 does not function desirably; Q can now be used to see variables 5/22/14 - 4 function made functional 5/20/14 - 4 function added, but still doesn't function desirably 5/20/14 - 1 and 3 functions now toggle effects
