PIR.py

#!/usr/bin/env python
import sys
import time
import RPi.GPIO as io
import subprocess
io.setmode(io.BCM)
PIR_PIN = 8
io.setup(PIR_PIN, io.IN)
while True:
    if io.input(PIR_PIN):
        print("POWER ON")
        subprocess.call("sudo /opt/vc/bin/tvservice -p && fbset -accel true",shell=True)
        time.sleep(20)
        print("POWER OFF")
        subprocess.call("sudo fbset -accel false && /opt/vc/bin/tvservice -o",shell=True)
    time.sleep(5)