def transition_function(mouse, path, goals):
mouse = Mouse(path[0])
for i in range(len(path)):
if i == 0:
continue
previous = path[i - 1]
position = path[i]
if position == (previous[0] - 1, previous[1]):
mouse.goNorth()
if position == (previous[0], previous[1] + 1):
mouse.goEast()
if position == (previous[0] + 1, previous[1]):
mouse.goSouth()
if position == (previous[0], previous[1] - 1):
mouse.goWest()
if position in goals:
mouse.get_goal(position)
return mouse
