import time
from utime import sleep
import utime
from machine import Pin

time.sleep(0.1) # Wait for USB to become ready


led1 = Pin(28, Pin.OUT)
led2 = Pin(27, Pin.OUT)
led3 = Pin(26, Pin.OUT)
led4 = Pin(22, Pin.OUT)

while True:

    led1.value(1)
    led2.value(1)
    led3.value(1)
    led4.value(1)

    utime.sleep(2)

    led1.value(0)
    led2.value(0)
    led3.value(0)
    led4.value(0)

    utime.sleep(1)

    led1.value(1)
    
    utime.sleep(2)

    led1.value(0)
    led2.value(1)

    utime.sleep(2)

    led1.value(0)
    led2.value(0)
    led3.value(1)
    
    utime.sleep(2)

    led1.value(0)
    led2.value(0)
    led3.value(0)
    led4.value(1)

    utime.sleep(2)