def move(self, direction):
"""can't move off left or right edges and loops around top and bottom
otherwise moves same as AnimatedFacingSprite
"""
AnimatedFacingSprite.move(self, direction)
#if ship is off left or right edges, "nudge" back to the edge
if self.rect.left < 0:
self.rect.left = 0
if self.rect.right > options.width:
self.rect.right = options.width
#if ship is off top or bottom edges, teleport to opposite edge
if self.rect.top < 0:
self.rect.bottom = options.height
if self.rect.bottom > options.height:
self.rect.top = 0
