import machine
import time

RELAY = 4
SWITCH = 13

relay = machine.Pin(RELAY, machine.Pin.OUT)
switch = machine.Pin(SWITCH, machine.Pin.IN, machine.Pin.PULL_UP)

print("Hello Christ")

while True:
    if switch.value() == 0: 
        relay.value(1)
        print("LED: ON")
    else:
        relay.value(0)
        print("LED: OFF")
    
    time.sleep(0.1)