from machine import Pin
import utime

led_1 = Pin(6,Pin.OUT)
led_2 = Pin(10,Pin.OUT)
led_3 = Pin(6,Pin.OUT)

while True:

led_1.value(1)
utime.sleep(0.5)
led_1.value(0)
utime.sleep(0.5)

led_2.value(1)
utime.sleep(0.5)
led_2.value(0)
utime.sleep(0.5)

led_3.value(1)
utime.sleep(1)
led_3.value(0)
utime.sleep(1)

led_2.value(1)
utime.sleep(0.5)
led_2.value(0)
utime.sleep(0.5)