#define PIN_RED 2     // The Arduino pin connected to R pin of traffic light module
#define PIN_YELLOW 3  // The Arduino pin connected to Y pin of traffic light module
#define PIN_GREEN 4   // The Arduino pin connected to G pin of traffic light module

#define RED_TIME 2000     // RED time in millisecond
#define YELLOW_TIME 1000  // YELLOW time in millisecond
#define GREEN_TIME 2000   // GREEN time in millisecond

#define RED    0  // Index in array
#define YELLOW 2  // Index in array
#define GREEN  1  // Index in array

const int pins[] = { PIN_RED, PIN_GREEN, PIN_YELLOW };
const int times[] = { RED_TIME, YELLOW_TIME, GREEN_TIME };
unsigned long last_time = 0;
int light = RED;  // start with RED light

void setup() {
  pinMode(PIN_RED, OUTPUT);
  pinMode(PIN_YELLOW, OUTPUT);
  pinMode(PIN_GREEN, OUTPUT);
  trafic_light_on(light);
  last_time = millis();
}

// the loop function runs over and over again forever
void loop() {

  val = digitalRead(inputPin); // read input value
  if (val == HIGH) { // check if the input is HIGH
    //digitalWrite(ledPin, HIGH); // turn LED ON
    if (pirState) {
    if ((millis() - last_time) > times[light]) {
    light++;
    if (light >= 3)
      light = RED;  // new circle

    trafic_light_on(light);
    last_time = millis();
     
    delay(50);
     // we have just turned on
     pirState = false;
     
   }
  takeLowTime = true;
  } else {
    //digitalWrite(ledPin, LOW); // turn LED OFF
 
    if (takeLowTime){
     timeLow = millis();
     takeLowTime = false;
    }
 
    if(!pirState && millis() - timeLow > minimummSecsLowForInactive){
     pirState = true;
     Serial.println("Motion ended!");
     
     delay(50);
     
    }
  }
  
  }

  // TO DO: your other code
}

void trafic_light_on(int light) {
  for (int i = RED; i <= YELLOW; i++) {
    if (i == light)
      digitalWrite(pins[i], HIGH);  // turn on
    else
      digitalWrite(pins[i], LOW);  // turn off
  }
}