unsigned long t_old;


void setup() {
  // put your setup code here, to run once:
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(7, INPUT_PULLUP);
digitalWrite(13, LOW);
digitalWrite(12, HIGH);
}

bool led0 = false;
bool led1 = false;
bool pkey = false;
bool flag = false;

void loop() {
  // put your main code here, to run repeatedly:
  unsigned long t_cur = millis();
  if((t_cur - t_old) >= 1000) {
    t_old = t_cur;
    flag = true;
  }


  bool key = !digitalRead(7);
  if (key && !pkey){
    pkey = true;
    delay(50);
  }
  if (!key && pkey){
    pkey = false;
    delay(50);
    led1 = !led1;
  }
digitalWrite(13, HIGH);
}