int red = 11;
int green = 12;
int blue = 13;

void setup() {
  // put your setup code here, to run once:
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(blue, HIGH);
  delay(1000);
  digitalWrite(red, HIGH);
  delay(1000);
  digitalWrite(green, HIGH);
  delay(1000);
  digitalWrite(red, LOW);
  delay(1000);
  digitalWrite(blue, LOW);
  delay(1000);
  digitalWrite(green, LOW);
  delay(1000);
}