const int pinR=5;
const int pinG=3;
const int pinB=4;
void setup() {
  // put your setup code here, to run once:
    pinMode(pinR, OUTPUT);
    pinMode(pinG, OUTPUT);
    pinMode(pinB, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  //for red light
  digitalWrite(pinR,HIGH);
  digitalWrite(pinG,LOW);
  digitalWrite(pinB,LOW);
  delay(5000);
  //for green light
  digitalWrite(pinR,LOW);
  digitalWrite(pinG,HIGH);
  digitalWrite(pinB,LOW);
  delay(5000);
  //for blue light
  digitalWrite(pinR,LOW);
  digitalWrite(pinG,LOW);
  digitalWrite(pinB,HIGH);
  delay(5000);
}