int ledyellow =2;
int ledred =3;
int ledblue =4;

void setup() {
 

  // put your setup code here, to run once:
  pinMode(ledyellow, OUTPUT);
  pinMode(ledred, OUTPUT);
  pinMode(ledblue, OUTPUT);

}

void loop() {
  // digitalWrite(ledyellow, HIGH);
  // digitalWrite(ledblue, HIGH);
  // digitalWrite(ledred, HIGH);
  // delay(1000);

  // digitalWrite(ledred, LOW);
  // delay(1000);
  // digitalWrite(ledblue, LOW);
  // delay(1000);
  // digitalWrite(ledyellow, LOW);
  // delay(1000);

  // digitalWrite(ledyellow, HIGH);
  // digitalWrite(ledblue, LOW);
  // delay(1000);
  // digitalWrite(ledyellow, LOW);
  // digitalWrite(ledred, HIGH);
  // delay(1000);
  // digitalWrite(ledred, LOW);
  // digitalWrite(ledblue, HIGH);
  // delay(1000);

//  for (int i=0; i<3;i++)
// {
//   digitalWrite(ledyellow, HIGH);
//   delay(1000);
//   digitalWrite(ledblue, HIGH);
//   delay(1000);
//   digitalWrite(ledred, HIGH);
//   delay(1000);

//   digitalWrite(ledred, LOW);
//   delay(1000);
//   digitalWrite(ledblue, LOW);
//   delay(1000);
//   digitalWrite(ledyellow, LOW);
//   delay(1000);

// }

//   digitalWrite(ledred, LOW);
//   digitalWrite(ledblue, LOW);
//   digitalWrite(ledyellow, LOW);

//   while (true) {
//     // Do nothing, keeping the LEDs off
//   }
 
}