int previousButton1 = HIGH;
int led1 = LOW;

void setup() {
  // put your setup code here, to run once:
  pinMode(12, OUTPUT);
  pinMode(2, INPUT_PULLUP);



}

void loop() {
  // put your main code here, to run repeatedly:

  int button1 = digitalRead(2);
  
  if(button1 != previousButton1){
    previousButton1 = button1;
    
    if(button1 == LOW){

      if(led1 == LOW){
        digitalWrite(12, HIGH);
        led1 = HIGH;

      }else if(led1 == HIGH){
        digitalWrite(12, LOW);
        led1 = LOW;

      }

    }

  }


}