This is a very simple
implementation of a fruit machine.
Nothing fancy, but it works.

Credits are earned as follows:
You start with 250 credits
with all THREE equal, 25 credits
with FIRST & SECOND equal, 15 credits
with SECOND & THIRD equal, 10 credits
and FIRST & THIRD equal, 5 credits
If you reach 0 credits, just hit the
AGAIN button to play again.