in gym_pusht/envs/pusht.py [0:0]
def add_segment(space, a, b, radius):
# TODO(rcadene): rename add_segment to make_segment, since it is not added to the space
shape = pymunk.Segment(space.static_body, a, b, radius)
shape.color = pygame.Color("LightGray") # https://htmlcolorcodes.com/color-names
return shape