#define BUZZER_PIN 7
#define PLAYER_COUNT 2

int buttonPins[PLAYER_COUNT]= {2,13};
int ledPins[PLAYER_COUNT]= {3,12};

void setup()
{
  for(int i = 0;i<PLAYER_COUNT;i++)
  {
    pinMode(ledPins[i],OUTPUT);
    pinMode(buttonPins[i],INPUT_PULLUP);
  }
  pinMode(BUZZER_PIN,OUTPUT);
}

void loop()
{
    delay(random(1000,3000));
    tone(BUZZER_PIN,2000,400);

    delay(400);

    for(int player = 0; ;player = (player+1)%PLAYER_COUNT)
    {
      if(digitalRead(buttonPins[player]))
      {
        digitalWrite(ledPins[player],HIGH);
        tone(BUZZER_PIN,3500,300);
        delay(1000);
        digitalWrite(ledPins[player],LOW);
        break;
      }
    }

}