Run it to draw a spiral of some shape (triangle, square, etc.) Change the sliders to show different shapes. If the hundredths are not zero, then the corners shift position that much from one loop to the next, making a higher-level spiral pattern. Press 'a' to see a little animation.
All mine. All 2 scripts. Wowee. 3-Jun-2017: Added scripts to do some animation. (Press 'a'.)