#define RED_1 2
#define YELLOW_1 4
#define GREEN_1 16

#define RED_2 17
#define YELLOW_2 5
#define GREEN_2 18

#define RED_3 19
#define YELLOW_3 21
#define GREEN_3 22

#define RED_4 23
#define YELLOW_4 25
#define GREEN_4 26

void setup() {
  pinMode(RED_1, OUTPUT);
  pinMode(YELLOW_1, OUTPUT);
  pinMode(GREEN_1, OUTPUT);
  
  pinMode(RED_2, OUTPUT);
  pinMode(YELLOW_2, OUTPUT);
  pinMode(GREEN_2, OUTPUT);
  
  pinMode(RED_3, OUTPUT);
  pinMode(YELLOW_3, OUTPUT);
  pinMode(GREEN_3, OUTPUT);
  
  pinMode(RED_4, OUTPUT);
  pinMode(YELLOW_4, OUTPUT);
  pinMode(GREEN_4, OUTPUT);
}

void loop() {
  // Simpangan 1
  digitalWrite(RED_1, HIGH);
  digitalWrite(GREEN_1, LOW);
  delay(5000);
  digitalWrite(YELLOW_1, HIGH);
  delay(2000);
  digitalWrite(RED_1, LOW);
  digitalWrite(YELLOW_1, LOW);
  digitalWrite(GREEN_1, HIGH);
  delay(5000);
  
  // Simpangan 2
  digitalWrite(RED_2, HIGH);
  digitalWrite(GREEN_2, LOW);
  delay(5000);
  digitalWrite(YELLOW_2, HIGH);
  delay(2000);
  digitalWrite(RED_2, LOW);
  digitalWrite(YELLOW_2, LOW);
  digitalWrite(GREEN_2, HIGH);
  delay(5000);
  
  // Simpangan 3
  digitalWrite(RED_3, HIGH);
  digitalWrite(GREEN_3, LOW);
  delay(5000);
  digitalWrite(YELLOW_3, HIGH);
  delay(2000);
  digitalWrite(RED_3, LOW);
  digitalWrite(YELLOW_3, LOW);
  digitalWrite(GREEN_3, HIGH);
  delay(5000);
  
  // Simpangan 4
  digitalWrite(RED_4, HIGH);
  digitalWrite(GREEN_4, LOW);
  delay(5000);
  digitalWrite(YELLOW_4, HIGH);
  delay(2000);
  digitalWrite(RED_4, LOW);
  digitalWrite(YELLOW_4, LOW);
  digitalWrite(GREEN_4, HIGH);
  delay(5000);
}