void setup() {
 pinMode(0, OUTPUT); // put your setup code here, to run once:
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
}

void loop() {
  digitalWrite(0, HIGH); // put your main code here, to run repeatedly:
digitalWrite(0, LOW);
delay(1000);// put your main code here, to run repeatedly:
digitalWrite(1, HIGH);
digitalWrite(1, LOW);
delay(1000);
digitalWrite(2, HIGH);
digitalWrite(2, LOW);
delay(1000);
}