void setup() {
  pinMode(33, OUTPUT);
  pinMode(32, OUTPUT);
  pinMode(25, OUTPUT);
}

void loop() {
  digitalWrite(33, 1);
  digitalWrite(32, 0);
  digitalWrite(25, 0);
  delay(500);
  digitalWrite(33, 0);
  digitalWrite(32, 1);
  digitalWrite(25, 0);
  delay(500);
  digitalWrite(33, 0);
  digitalWrite(32, 0);
  digitalWrite(25, 1);
  delay(500);
}




sketch.ino

diagram.json

void led(bool red, bool yellow, bool green){
  digitalWrite(33, red);
  digitalWrite(32, yellow);
  digitalWrite(25, green);
}