int btn_1 ;
int btn_1lock;
int state;

void setup() {
  pinMode(13, INPUT);
  pinMode(12,OUTPUT);
  Serial.begin(9600);
  btn_1lock = 1 ;
}

void loop() {
btn_1 = digitalRead(13);
if (btn_1 == 1 && btn_1lock == 1){
  if(state == 0){
    state = 1 ;
  }else{
    state = 0;
  }
  Serial.println(state);
  btn_1lock = 0;
  delay(1000);
}
if (btn_1 == 0){
  btn_1lock = 1;
}
if (state == 1) {
  digitalWrite(12, HIGH);
}else{
  digitalWrite(12, LOW);
}
}