from machine import Pin
import time

led1 = Pin(5, Pin.OUT)
led2 = Pin(6, Pin.OUT)
led3 = Pin(7, Pin.OUT)
while True:
    led1.on()
    time.sleep(2)
    led1.off()
    time.sleep(1)
    
    led2.on()
    time.sleep(2)
    led2.off()
    time.sleep(0.5)
    
    led3.on()
    time.sleep(0.5)
    led3.off()
    time.sleep(0.5)
    led3.on()
    time.sleep(0.5)
    led3.off()
    time.sleep(0.5)

    led2.on()
    time.sleep(1)
    led2.off()
    time.sleep(1)