def demo():
from relay import Relay
import time
relay = Relay(2)
relay.off()
data = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
frc = Mfrc522()
print("Checking Tag")
print(frc.read())
relay.on()
time.sleep(1)
relay.flip()
relay.blink()
print("Writting data to tag")
print(frc.write(data))
relay.stop_blink()
time.sleep(1)
relay.on()
print("Check again")
print(frc.read())
time.sleep(1)
relay.off()
