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

}

void loop() {
 digitalWrite(13, HIGH); // put your main code here, to run repeatedly:
delay(100);
digitalWrite(13, LOW);
delay(100);
digitalWrite(12, HIGH);;
delay(100);
digitalWrite(12, LOW);
delay(100);
digitalWrite(11, HIGH);
delay(100);
digitalWrite(11, LOW);
delay(100);
}