Arduino - Turn on/off lamp for 5 seconds, when button is pushed, with timer reset button option

// Turn ON/OFF a Relay/LED, when button is pushed
// Relay Automatically turns OFF/ON again after 5 seconds (it is possible to adjust interval)
// With option to reset the timer - so Relay turns ON/OFF at push of 'reset timer button'

const int SetPin = 6;     //pin connected to ON button - (other side of button is connected to ground/minus)
const int ResetPin = 7;   //pin connected to 'Reset timer button' - (other side of button is connected to ground/minus)
const int relayPin = 9;   //pin connected to control of Relay/LED

//makes it easy to switch between relays that are controlled by HIGH or LOW signal
const int RELAY_ON = HIGH;
const int RELAY_OFF = LOW;

int buttonState1 = 0;
int buttonState2 = 0;

unsigned long timerMillis = 0; // is set when timer is started
unsigned long interval = 5000; // interval of the timer - (time that the LED/relay is ON)
                               // (1000 = 1 second), (60000 = 1 minute), (600000 = 10 minutes)

int ledStatus = 0;   // is used to keep track of relay/LED status

void setup() {
  pinMode(relayPin, OUTPUT);
  pinMode(SetPin, INPUT_PULLUP);
  pinMode(ResetPin, INPUT_PULLUP);
  digitalWrite(relayPin, RELAY_OFF);
} // End - setup()

void loop() {
  // read buttons
  buttonState1 = digitalRead(SetPin);
  buttonState2 = digitalRead(ResetPin);

  // take action if a button was pressed
  if (buttonState1 == LOW) {
    digitalWrite(relayPin, RELAY_ON);
    ledStatus = 1;
  }
  if (buttonState2 == LOW) {
    digitalWrite(relayPin, RELAY_OFF);
    ledStatus = 0;
  }

  // if relay is ON, then check to see if timer has expired
  if (ledStatus == 1) {
    if (millis() - timerMillis >= interval) {
      timerMillis = millis();
      digitalWrite(relayPin, RELAY_OFF);
      ledStatus = 0;
    }
  }
} // End - loop()