sc.refresh()
bg.update(sc)
bl.update(sc)
bo.entrance()
bo.printer(sc)
t = u.move()
if t != 0 and t != 1:
u.fall()
bl.new_bullet(t)
elif t == 0:
u.fall()
sc.add_trash(bo.damage(bl.get_centre()))
for bul in sc.get_trash():
bl.erase(bul)
sc.init_trash()
u.printer(sc)
sc.print_screen()
sleep(0.0715)
system('clear')
sc.set_boss(bo.get_health())
