void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(17, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(23, OUTPUT);

  pinMode(16, INPUT_PULLUP);
}

long currentTime = 0;
long LastSaveTime = 0;
bool toggle7Segment = true;
int currentnum = 0;
void loop() {
  currentTime=millis();

  if(currentTime-LastSaveTime>=500)
  {
    LastSaveTime = currentTime;
    if(digitalRead(16) == HIGH)
    {
      showSevenSegment(0,toggle7Segment);
    }
    else
    {
      showSevenSegment(currentnum,toggle7Segment);
      Serial.println(currentnum);
      if(toggle7Segment == true)
      {
        currentnum=currentnum+1;
      }
      if(currentnum>15)
      {
        currentnum=0;
      }
    }
    toggle7Segment = !toggle7Segment;
  }
}
void showSevenSegment(int num, bool status)
{
  if(num == 0)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH);
      digitalWrite(5, HIGH);
      digitalWrite(18, HIGH);
      digitalWrite(19, HIGH);
      digitalWrite(21, HIGH);
      digitalWrite(22, LOW);
      digitalWrite(23, HIGH);
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 1)
  {
    if(status == true)
    {
      digitalWrite(17, LOW);
      digitalWrite(5, HIGH);
      digitalWrite(18, HIGH);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
    else if(num == 2)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, LOW); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, LOW); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 3)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, LOW); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, LOW); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 4)
  {
    if(status == true)
    {
      digitalWrite(17, LOW); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, LOW); //d
      digitalWrite(21, LOW); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 5)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, LOW); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, LOW); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
    else if(num == 6)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, LOW); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
    else if(num == 7)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, LOW); //d
      digitalWrite(21, LOW); //e
      digitalWrite(22, LOW); //g
      digitalWrite(23, LOW); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
    else if(num == 8)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 9)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, LOW); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 10)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, LOW); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 11)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 12)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, LOW); //b
      digitalWrite(18, LOW); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, LOW); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 13)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, HIGH); //b
      digitalWrite(18, HIGH); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, LOW); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 14)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, LOW); //b
      digitalWrite(18, LOW); //c
      digitalWrite(19, HIGH); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
  else if(num == 15)
  {
    if(status == true)
    {
      digitalWrite(17, HIGH); //a
      digitalWrite(5, LOW); //b
      digitalWrite(18, LOW); //c
      digitalWrite(19, LOW); //d
      digitalWrite(21, HIGH); //e
      digitalWrite(22, HIGH); //g
      digitalWrite(23, HIGH); //f
    }
    else
    {
      digitalWrite(17, LOW);
      digitalWrite(5, LOW);
      digitalWrite(18, LOW);
      digitalWrite(19, LOW);
      digitalWrite(21, LOW);
      digitalWrite(22, LOW);
      digitalWrite(23, LOW);
    }
  }
}