import machine
import time

# Define the relay pins
relay_pins = [
    machine.Pin(14, machine.Pin.OUT),  # Relay CH1
    machine.Pin(15, machine.Pin.OUT),  # Relay CH2
    machine.Pin(16, machine.Pin.OUT),  # Relay CH3
    machine.Pin(17, machine.Pin.OUT),  # Relay CH4
    machine.Pin(18, machine.Pin.OUT),  # Relay CH5
    machine.Pin(19, machine.Pin.OUT),  # Relay CH6
    machine.Pin(20, machine.Pin.OUT),  # Relay CH7
    machine.Pin(21, machine.Pin.OUT)   # Relay CH8
]

def control_relays():
    while True:
        for relay in relay_pins:
            relay.value(1)  # Turn relay on
            time.sleep(2)   # Wait for 1 second
            relay.value(0)  # Turn relay off
            time.sleep(1)   # Wait for 1 second

control_relays()