ScarletRose:

I agree with you. I want just to mention that simple picture (maybe one provided by chessmec at http://mec.tuwien.ac.at/private/mnemetz/brainking/redstone.png ) should be used. I like his picture but I think circle could by filled with other - not red - color.

BTW you can make better picture to have regular curve, but it'll have large size. I made smallest picture and then resize them - I think if you start creating every picture separatelly, they should look much better :-)