// const int RLED = 0;
// const int GLED = 1;
// const int YLED = 2;
// void setup() {
//   // put your setup code here, to run once:
//   pinMode(RLED,OUTPUT);
//   pinMode(GLED,OUTPUT);
//   pinMode(YLED,OUTPUT);
// }

// void loop() {
//   // put your main code here, to run repeatedly:
//   digitalWrite(RLED,HIGH);
//   digitalWrite(YLED,LOW);
//   digitalWrite(GLED,LOW);
//   delay(5000);
//   digitalWrite(RLED,LOW);
//   digitalWrite(YLED,HIGH);
//   digitalWrite(GLED,LOW);
//   delay(1000);
//   digitalWrite(RLED,LOW);
//   digitalWrite(YLED,LOW);
//   digitalWrite(GLED,HIGH);
//   delay(3000);
// }
const int red_led = 0;
const int green_led = 1;
const int blue_led = 2;

void setup(){
  pinMode(red_led, OUTPUT);
  pinMode(green_led,OUTPUT);
  pinMode(blue_led,OUTPUT);
}

void loop(){
  digitalWrite(red_led,HIGH);
  digitalWrite(green_led,LOW);
  digitalWrite(blue_led,LOW);
  delay(3000);
  digitalWrite(red_led,LOW);
  digitalWrite(green_led,LOW);
  digitalWrite(blue_led,HIGH);
  delay(1000);
  digitalWrite(red_led,LOW);
  digitalWrite(green_led,HIGH);
  digitalWrite(blue_led,LOW);
  delay(2000);
}