#include <TM1637Display.h>

#define LED 7
#define START_STOP_BUTTON 4 // Pin untuk tombol START/STOP
#define RESET_BUTTON 5      // Pin untuk tombol RESET

#define START digitalRead(START_STOP_BUTTON)
#define RESET digitalRead(RESET_BUTTON)

#define CLK 0
#define DIO 2

unsigned int angka = 100;
bool timerBerjalan = false;

TM1637Display display(CLK,DIO);

void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);
  pinMode(START_STOP_BUTTON, INPUT_PULLUP); // Aktifkan pullup resistor internal
  pinMode(RESET_BUTTON, INPUT_PULLUP);

  display.setBrightness(1);
  display.clear();
  display.showNumberDec(angka);

}

void loop() {
  display.showNumberDec(angka); 
  
  if(START == LOW){
    if(timerBerjalan){
      timerBerjalan = false;
      digitalWrite(LED, LOW);
    } else {
      timerBerjalan = true;
      digitalWrite(LED, HIGH);
    }

    delay(500);
  } 

  if(RESET == LOW){
    angka = 100;
    timerBerjalan = false;
    digitalWrite(LED, LOW);
  }

  if(timerBerjalan){
    // Jika angka lebih dari 0
    if (angka > 0){ 
      // Angka dikurangi 1
      timerBerjalan = true;
      digitalWrite(LED, HIGH);
      delay(1000);
      angka--;
    } else {
      timerBerjalan = false;
      digitalWrite(LED, LOW);
    }
  }
}