#define buzzerPin 9 //the buzzer attach to 
const int player1button = 14;
const int player2button = 15;
const int player3button = 16;
const int player4button = 17;
const int pressallowed = 19;
const int reset = 18;

const int player1led = 5;
const int player2led = 4;
const int player3led = 3;
const int player4led = 2;

int button1State = 0;
int button2State = 0;
int button3State = 0;
int button4State = 0;

void setup() {
  //define pinmodes
  pinMode(player1button, INPUT);
  pinMode(player2button, INPUT);
  pinMode(player3button, INPUT);
  pinMode(player4button, INPUT);
  pinMode(pressallowed, INPUT);
  pinMode(reset, INPUT);
  pinMode(player1led, OUTPUT);
  pinMode(player2led, OUTPUT);
  pinMode(player3led, OUTPUT);
  pinMode(player4led, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

//startup animation of the LEDS
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, HIGH);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);

}

void loop() {
  
//read digital inputs
button1State = digitalRead(player1button);
button2State = digitalRead(player2button);
button3State = digitalRead(player3button);
button4State = digitalRead(player4button);

//declare playerstatus
static boolean player1win = false;
static boolean player2win = false;
static boolean player3win = false;
static boolean player4win = false;

  
// detect who pushes first
if (button1State == HIGH && player2win == false && player3win == false && player4win == false) {
    Alarm();
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    player1win = true;
}

if (button2State == HIGH && player1win == false && player3win == false && player4win == false ) {
    Alarm();
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    player2win = true;
}

if (button3State == HIGH && player1win == false && player2win == false && player4win == false ) {
    Alarm();
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, LOW);
    player3win = true;
}

if (button4State == HIGH && player1win == false && player2win == false && player3win == false ) {
    Alarm();
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, HIGH);
    player4win = true;
}
 
//When the reset is pushed:
//Reset the winning player
if (digitalRead(reset) == HIGH) {
    //P.displayClear();
    player1win = false;
    player2win = false;
    player3win = false;
    player4win = false;

//And play a short animation on the LED to show that the buttons have been reset.
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, HIGH);
    delay(200);
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(200);
    digitalWrite(player1led, HIGH);
    digitalWrite(player2led, HIGH);
    digitalWrite(player3led, HIGH);
    digitalWrite(player4led, HIGH);
    delay(200);
    digitalWrite(player1led, LOW);
    digitalWrite(player2led, LOW);
    digitalWrite(player3led, LOW);
    digitalWrite(player4led, LOW);
    delay(1000);
    
}
}
void Alarm() {
    for(int i=0; i<100; i++){
        digitalWrite(buzzerPin,HIGH); 
        delay(2);
        digitalWrite(buzzerPin,LOW); 
        delay(2);
    }
}