
Spiro

 Use <Tab> to swap colours.

 Use '>' to increase OR '<' to decrease drawing speed -
 OR use keypad keys 0,1,2,...,6  :  (0=fastest, 6=slowest)
 (you can also use the keyboard numbers 0,1,2,...,6 at the top).

 Use <Space> to hold a finished display, and then any key to restart.

 Use <Space> to freeze frame, and then release to resume drawing.

 Click <S> to single step the drawing (or hold <S> down).
