# here is the code in python
import machine
import utime

RED_pin = machine.Pin(15, machine.Pin.OUT)

while True:
    REDled_pin.value(1) # turn LED on
    utime.sleep(1) # wait for 1 second
    REDled_pin.value(0) # turn LED off
    utime.sleep(1) # wait for 1 second