#include <Arduino.h>
const int rPin = 12;
const int yPin = 14;
const int gPin = 13;

void setup() {
  pinMode(rPin, OUTPUT);
  pinMode(yPin, OUTPUT);
  pinMode(gPin, OUTPUT);
}

void loop() {
  digitalWrite(rPin, HIGH);
  digitalWrite(yPin, LOW);
  digitalWrite(gPin, LOW);
  delay(5000); 
  digitalWrite(rPin, HIGH);
  digitalWrite(yPin, HIGH);
  digitalWrite(gPin, LOW);
  delay(2000);
  digitalWrite(rPin, LOW);
  digitalWrite(yPin, LOW);
  digitalWrite(gPin, HIGH);
  delay(5000);
  digitalWrite(rPin, LOW);
  digitalWrite(yPin, HIGH);
  digitalWrite(gPin, LOW);
  delay(2000);
}