/*
    A blocking traffic light version 2
    Djordje Herceg, 5.4.2024.
*/

#define LED1 18
#define LED2 17
#define LED3 16

int leds[] = {LED1, LED2, LED3};
int k = 2;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("A blocking traffic light example");
  for (int i = 0; i < 3; i++){
    pinMode(leds[i], OUTPUT);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(leds[k], LOW);
  k = (k + 1) % 3; //Gives de remainder of the division by 3
  Serial.println(k);
  digitalWrite(leds[k], HIGH);
  delay(500);
}