from machine import Pin 
import time 

SWITCH = Pin(13, Pin.IN)
LED_RED = Pin(21, Pin.OUT)
LED_GREEN = Pin(19, Pin.OUT)
LED_BLUE = Pin(18, Pin.OUT)
LED_YELLOW = Pin(5, Pin.OUT)

while True:
  
  if SWITCH.value() == 1:
    LED_RED.value(1)
    LED_GREEN.value(1)
    LED_BLUE.value(1)
    LED_YELLOW.value(0)
    time.sleep(0.5)
    LED_BLUE.value(0)
    LED_YELLOW.value(1)
    time.sleep(0.5)

  if SWITCH.value() == 0:
    LED_RED.value(1)
    LED_GREEN.value(0)
    LED_BLUE.value(1)
    LED_YELLOW.value(1)
    time.sleep(0.5)
    LED_RED(0)
    LED_GREEN(1)
    time.sleep(0.5)