From machine import Pin
import utime 

led_r=Pin(3,Pin.OUT)
led_o=Pin(6,Pin.OUT)
led_g=Pin(10,Pin.OUT)

while True:

    led_r.value(1)
    utime.sleep (1)
    led_r.value (0)
    utime.sleep (1)

    led_r.value(1)
    utime.sleep (1)
    led_r.value (0)
    utime.sleep (1)

    led_r.value(1)
    utime.sleep (1)
    led_r.value (0)
    utime.sleep (1)