void setup() {
  // put your setup code here, to run once:
  int RED_LED = 18;
  int buttonPin = 2;
  

  pinMode(18, OUTPUT);
  pinMode(2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(18, HIGH);
  delay(2000);
  digitalWrite(18, LOW);
  delay(3000);
}