void setup() {

    pinMode(0, OUTPUT);
    digitalWrite(0, HIGH);
    pinMode(2, OUTPUT);
    digitalWrite(2, HIGH);
    pinMode(4, OUTPUT);
    digitalWrite(4, HIGH);
    pinMode(3, OUTPUT);
    digitalWrite(3, HIGH);
    }

    // the loop function runs over and over again forever
    void loop() {
    digitalWrite(2, HIGH);   // turn the LED on (HIGH is the voltage level)
    digitalWrite(4, HIGH);
    delay(1000);              // wait for a second
    digitalWrite(2, LOW);
    digitalWrite(4,LOW );// turn the LED off by making the voltage LOW
    delay(1000);