int redPin=13;
int greenPin=12;
int bluePin=11;
void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
analogWrite(redPin,255);
analogWrite(greenPin,0);
analogWrite(bluePin,0);
delay(1000);

analogWrite(redPin,0);
analogWrite(greenPin,255);
analogWrite(bluePin,0);
delay(1000);

analogWrite(redPin,0);
analogWrite(greenPin,0);
analogWrite(bluePin,255);
delay(1000);
}