from machine import Pin
from time import sleep, ticks_ms

button = Pin(5 , Pin.IN, Pin.PULL_UP)
led1 = Pin(4, Pin.OUT)
led2 = Pin(2, Pin.OUT)
led3 = Pin(15, Pin.OUT)

button_eerder = 0
state = 0

while True:
    button_nu = button.value()
    if button_nu != button_eerder:
        button_eerder = button_nu        
        if button_nu == 0:
          state += 1
          if state > 3:
            state = 0
          print("state = ", state)
          
          if state == 0:
            led3.value(0)
          elif state == 1:
            led1.value(1)
          elif state == 2:
            led2.value(1)
            led1.value(0)
          elif state == 3:
            led3.value(1)
            led2.value(0)
        sleep(0.005)