from machine import Pin
from utime import sleep

print("Hello, ESP32!")

rode_led = Pin(15, Pin.OUT)
blauwe_led = Pin(18, Pin.OUT)

while True:
  rode_led.on()
  blauwe_led.on()  
  sleep(0.5)
  rode_led.off()
  blauwe_led.off()
  sleep(0.5)