Thanks for the reply,
It was only after submitting the question that i realised that I had left out the

 
$box->print_shape();
[download]

and also printing of line two and three in the method print_shape. So all that was in the original code.
My original idea was to have each shape 3 lines long, and then just hardcode the printing of the hash. I have this sample code running with arrays, but was using a hash for extra learning value.
Ant