#include "function.h"

void setup() {
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(27, OUTPUT);

  int angka = penambahan(5,2);

  Serial.begin(9600);
  Serial.print(angka);
}

void loop() {
  trafficLight(1000, 1,0,0);
  trafficLight(500, 0,1,0);
  trafficLight(500, 0,0,1);
}

sketch.ino

diagram.json

void trafficLight(int jeda, bool merah, bool kuning, bool hijau){
  digitalWrite(25, merah);
  digitalWrite(26, kuning);
  digitalWrite(27, hijau);
  delay(jeda);
}

int penambahan(int a, int b){
  int c = a + b;
  return c;
}