Hi there, This looks like a typo: > > # DirectionSymbol: (deltaX, deltaY) Assumes 0,0 lower left corner > > directions = {'n': (1, 0), 's': (-1, 0), 'w': (-1, 0), 'e': (1, 9)} You probably want 'e' to be (1,0) and not (1,9)... Y, Scot -- Scot W. Stevenson -- scot@possum.in-berlin.de -- Zepernick, Germany