def jump_fall():
    global jump
    global frame
    if (jump != 0):
        frame = 0
        player.y += jump
    if (player.y >= 484):
        unblock_jump()
        jump = 0
    if (player.y <= 250):
        jump *= (- 1)
def jump_fall():
    global jump
    global frame
    if (jump != 0):
        frame = 0
        player.y += jump
    if (player.y >= 484):
        unblock_jump()
        jump = 0
    if (player.y <= 250):
        jump *= (- 1)