int RED = 11;
int GREEN = 10;
int BLUE = 9;

void setup() {
  // put your setup code here, to run once:
digitalWrite(RED, 1);
digitalWrite(GREEN, 0);
digitalWrite(BLUE, 0);
digitalWrite(4, 1);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(11, 1);
delay(500);
digitalWrite(11, 0);
delay(500);
digitalWrite(10, 1);
delay(500);
digitalWrite(10, 0);
delay(500);
digitalWrite(9, 1);
delay(500);
digitalWrite(9, 0);
delay(500);
}