This version has three changes
- It adds support to allow a drawing to be stopped and a new drawing started by re-running the Sonic Pi program.
- It add support to change the colour at random while plotting a drawing
- It generates the parameters automatically from three random values. If you don't like a pattern, discard it by re-running the Sonic-Pi program
Use the program spiroAuto.rb in Sonic Pi to use these facilites, although the program spiro.rb will work as before.