int button1 = 2;
int button2 = 3;
int button3 = 4;
int button4 = 5;
int button5 = 12;
int button6 = 13;
int button7 = 22;

int buzzerPin = 14; 

int LED1 = 15;
int LED2 = 16;
int LED3 = 17;
int LED4 = 18;
int LED5 = 19;
int LED6 = 21;
int LED7 = 23;

int flag = 0;
int b1State,b2State,b3State,b4State,b5State,b6State,b7State = 0;

int team1Score = 0;
int team2Score = 0;
int team3Score = 0;
int team4Score = 0;
int team5Score = 0;
int team6Score = 0;

void setup()
{
  Serial.begin(9600);

  pinMode(buzzerPin, OUTPUT); 
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT); 
  pinMode(LED3, OUTPUT); 
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
  pinMode(LED6, OUTPUT);
  pinMode(LED7, OUTPUT);
 
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP); 
  pinMode(button4, INPUT_PULLUP);
  pinMode(button5, INPUT_PULLUP);
  pinMode(button6, INPUT_PULLUP);
  pinMode(button7, INPUT_PULLUP);
  
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW); 
  digitalWrite(LED3, LOW); 
  digitalWrite(LED4, LOW);
  digitalWrite(LED5, LOW);
  digitalWrite(LED6, LOW);
  digitalWrite(LED7, LOW);
}

void loop()
{
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW); 
  digitalWrite(LED3, LOW); 
  digitalWrite(LED4, LOW);
  digitalWrite(LED5, LOW);
  digitalWrite(LED6, LOW);
  digitalWrite(LED7, LOW);
  
  b7State = digitalRead(button7);
  
  if(b7State == 0)
  {
    if(b7State == 0)
   {
      flag = 1;
      digitalWrite(LED7, HIGH);
      delay(200); 
    }
  }
  if(1 == flag)
  {
    b1State = digitalRead(button1); 
    b2State = digitalRead(button2);
    b3State = digitalRead(button3);
    b4State = digitalRead(button4);
    b5State = digitalRead(button5);
    b6State = digitalRead(button6);

    if(b1State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,HIGH);
      digitalWrite(LED2,LOW); 
      digitalWrite(LED3,LOW);
      digitalWrite(LED4,LOW);
      digitalWrite(LED5,LOW);
      digitalWrite(LED6,LOW);
      Serial.println("Team 1 Buzzed in!");
      team1Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }
    
    if(b2State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,HIGH); 
      digitalWrite(LED3,LOW); 
      digitalWrite(LED4,LOW);
      digitalWrite(LED5,LOW);
      digitalWrite(LED6,LOW);
      Serial.println("Team 2 Buzzed in!");
      team2Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }
    
    if(b3State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,LOW); 
      digitalWrite(LED3,HIGH); 
      digitalWrite(LED4,LOW);
      digitalWrite(LED5,LOW);
      digitalWrite(LED6,LOW);
      Serial.println("Team 3 Buzzed in!");
      team3Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }

    if(b4State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,LOW); 
      digitalWrite(LED3,LOW);
      digitalWrite(LED4,HIGH);
      digitalWrite(LED5,LOW);
      digitalWrite(LED6,LOW);
      Serial.println("Team 4 Buzzed in!");
      team4Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }

    if(b5State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,LOW); 
      digitalWrite(LED3,LOW);
      digitalWrite(LED4,LOW);
      digitalWrite(LED5,HIGH);
      digitalWrite(LED6,LOW);
      Serial.println("Team 5 Buzzed in!");
      team5Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }

    if(b6State == 0)
    {
      flag = 0;
      digitalWrite(LED7, LOW);
      Alarm();
      digitalWrite(LED1,LOW);
      digitalWrite(LED2,LOW); 
      digitalWrite(LED3,LOW);
      digitalWrite(LED4,LOW);
      digitalWrite(LED5,LOW);
      digitalWrite(LED6,HIGH);
      Serial.println("Team 6 Buzzed in!");
      team6Score++;
      Serial.println("-----------Scores of All Teams-----------");
      Serial.print("Team 1 Score: ");
      Serial.println(team1Score);
      Serial.print("Team 2 Score: ");
      Serial.println(team2Score);
      Serial.print("Team 3 Score: ");
      Serial.println(team3Score);
      Serial.print("Team 4 Score: ");
      Serial.println(team4Score);
      Serial.print("Team 5 Score: ");
      Serial.println(team5Score);
      Serial.print("Team 6 Score: ");
      Serial.println(team6Score);
      while(digitalRead(button7));
    }
  }
}

void Alarm() 
{
  for(int i=0;i<100;i++)  {
    tone(buzzerPin, 1000);
    delay(2);
    tone(buzzerPin, LOW);
    delay(2);
  }
}