int RED_T = 25;
int YELLOW_T = 26;
int GREEN_T = 27;

int RED_P = 14;
int GREEN_P = 12;
  
void setup()
{
  pinMode(RED_T, OUTPUT);
  pinMode(YELLOW_T, OUTPUT);
  pinMode(GREEN_T, OUTPUT);
  
  pinMode(RED_P, OUTPUT); 
  pinMode(GREEN_P, OUTPUT);
}

void loop()
{
  // GREEN light (Cars go)
  digitalWrite(GREEN_T, HIGH);
  digitalWrite(YELLOW_T, LOW);
  digitalWrite(RED_T, LOW);

  digitalWrite(RED_P, HIGH);
  digitalWrite(GREEN_P, LOW);
  delay(5000);   // 5 seconds

  // YELLOW light
  digitalWrite(GREEN_T, LOW);
  digitalWrite(YELLOW_T, HIGH);
  delay(3000);   // 3 seconds

  // RED light (Pedestrians go)
  digitalWrite(YELLOW_T, LOW);
  digitalWrite(RED_T, HIGH);

  digitalWrite(RED_P, LOW);
  digitalWrite(GREEN_P, HIGH);
  delay(5000);   // 5 seconds
}