GDScript Corner Correction

func attempt_correction(amount: int):
    var delta = get_physics_process_delta_time()
    if velocity.y < 0 and test_move(global_transform,
    Vector2(0, velocity.y*delta)):
        for i in range(1, amount*2+1):
            for j in [-1.0, 1.0]:
                if !test_move(global_transform.translated(Vector2(i*j/2, 0)),
                Vector2(0, velocity.y*delta)):
                    translate(Vector2(i*j/2, 0))
                    if velocity.x * j < 0: velocity.x = 0
                    return