void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT); pinMode(7, OUTPUT); pinMode(8, OUTPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2, HIGH);
delay(10);
digitalWrite(2, LOW);
delay(500);
digitalWrite(7, HIGH);
delay(10);
digitalWrite(7, LOW);
delay(500);
digitalWrite(8, HIGH);
delay(10);
digitalWrite(8, LOW);
delay(500);


}