Adjust the a and b sliders before clicking the add button. The button adds a to the list b times. You can view the list, which is called "turn". The list records how much the pen turns before moving. You can adjust the "rotations" slider to change how many times the pattern is drawn. It is drawn like spokes. It will be rounded to a factor of 360. Click the paintbrush button to draw the pattern. If you didn't get all that, see inside and you might.
For the sds. All by me.
