---

import ctypes
import random
import time

user32 = ctypes.windll.user32
gdi32 = ctypes.windll.gdi32

SW = user32.GetSystemMetrics(0)
SH = user32.GetSystemMetrics(1)

hdc_screen = user32.GetDC(0)
hdc_mem = gdi32.CreateCompatibleDC(hdc_screen)
hbitmap = gdi32.CreateCompatibleBitmap(hdc_screen, SW, SH)
gdi32.SelectObject(hdc_mem, hbitmap)

while True:
    if user32.GetAsyncKeyState(0x51) & 0x8000:
        if user32.GetAsyncKeyState(0x11) & 0x8000:
            if user32.GetAsyncKeyState(0x12) & 0x8000:
                break

    gdi32.BitBlt(
        hdc_mem, 0, 0, SW, SH,
        hdc_screen, 0, 0,
        0x00CC0020
    )

    x = random.randrange(0, SW - 10, 10)
    shift = random.choice([-10, 10])

    gdi32.BitBlt(
        hdc_screen,
        x,
        shift,
        10,
        SH - abs(shift),
        hdc_mem,
        x,
        0 if shift > 0 else abs(shift),
        0x00CC0020
    )

    time.sleep(1)

user32.ReleaseDC(0, hdc_screen)
gdi32.DeleteObject(hbitmap)
gdi32.DeleteDC(hdc_mem)