RoboPit
A place for robots to wander around in
It will be filled up with obstacles with the addObstacles method
default size 500*500 with top left corner at (10,10)
obstacles will be (SIZE/6)*(SIZE/50) with separation of SIZE/12
Constructor for objects of class Robot
note -- do not follow the textbook advice to end the constructor with
start()
It makes it difficult to extend the class
Since this is abstract, that would be a disaster!