import machine
import utime

# internal LED definition
led_onboard = machine.Pin(25, machine.Pin.OUT)

# external RED, YELLOW, GREEN LED
led_external_red = machine.Pin(2, machine.Pin.OUT)
led_external_yellow = machine.Pin(3, machine.Pin.OUT)
led_external_green = machine.Pin(4, machine.Pin.OUT)


# main loop
led_onboard.value(1)
led_external_red.value(1)
led_external_yellow.value(1)
led_external_green.value(1)

utime.sleep(2.5)

led_onboard.value(0)
led_external_red.value(0)
led_external_yellow.value(0)
led_external_green.value(0)