Windows -> Save as afk.pyw and double click on it to run headlessly.

afk.py

#!/usr/bin/env python3
import sys
import os
import time
import random
import platform

try:
    import pyautogui
except ImportError:
    sys.exit(1)

# --- Headless setup ---
if platform.system() == "Windows":
    import ctypes
    hwnd = ctypes.windll.kernel32.GetConsoleWindow()
    if hwnd:
        ctypes.windll.user32.ShowWindow(hwnd, 0)

# Silence all output
sys.stdout = open(os.devnull, "w")
sys.stderr = open(os.devnull, "w")

# --- Config ---
INTERVAL      = 30
INTERVAL_RAND = 5
MOVE_PX       = 10
JITTER_PX     = 3
OUT_DURATION  = 0.2
BACK_DURATION = 0.2

pyautogui.FAILSAFE = True

# --- Main ---
def main():
    while True:
        sleep_time = INTERVAL + random.uniform(-INTERVAL_RAND, INTERVAL_RAND)
        time.sleep(max(1, sleep_time))

        x, y = pyautogui.position()
        dx = random.randint(-MOVE_PX - JITTER_PX, MOVE_PX + JITTER_PX)
        dy = random.randint(-MOVE_PX - JITTER_PX, MOVE_PX + JITTER_PX)

        pyautogui.moveTo(x + dx, y + dy, duration=OUT_DURATION)
        pyautogui.moveTo(x, y, duration=BACK_DURATION)

if __name__ == "__main__":
    try:
        main()
    except (pyautogui.FailSafeException, KeyboardInterrupt):
        sys.exit(0)
    except Exception:
        sys.exit(1)

Move the cursor to any corner to kill the process.