1.) The Stylophone was accidentally invented in 1968 in Britain and production of the original model ran right into the early 80's
2.) Rolf Harris put the Stylophone on the map with his cheesy advertising and even gave handy techniques and lessons on television
Plato is pointing up to the heavens, signifying that everything is a reflection of Forms that resides in heaven.
The three primary colors are red yellow and blue, so the only option that would work would be yellow! I hope this helps! :)
