Make really neat patterns with ease! Draw here and it appears there, too! Woooooow...
Try it out and tell me if you like it.
Updated with some improvements suggested by milinko959 and database_9, and some I thought of myself(!). I'm sorry for not implementing other suggestions, but:
I didn't include music because it's not meant to be a music machine. It's a drawing toy. It would be like having music in MS Paint.
I didn't include an option to resize the drawing box and change number of duplicates, because it would demand rewriting the major part of the tool. Good suggestion though, and it was thought of before :)