@Hippo, I could probably determine the chord length of a completed line and, instead of moving (or drawing) 5 pixels at a time, move (draw) the entire chord length each act step. I would think that would help for the visual on the site.

@Hippo, that is top speed -- right? Believable. However, in the greenfoot application, it runs SO much quicker (probably 20 to 30 or more times quicker). The visual effect is greatly enhanced..