Reaction Game

/*
  The reaction game!
 */

// include the library code:
#include <LiquidCrystal.h>

    int playerOnePin = A0;    // select the input pin for the potentiometer
    int playerTwoPin = A1;
    int ledPin = 9;      // select the pin for the LED
    int ledPin2 = 10;
    int resetBtn = 13;
    int player1 = 0;
    int player2 = 0;
    const int THRESHOLD = 200;
    boolean roundOver = false;
    int rando;
    long lastReset = 0;

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
long numMillis = 10*1000-1;

void setup() {
  lastReset = millis();
  randomSeed(analogRead(0));
  pinMode(ledPin, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(resetBtn, INPUT);
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  resetRound();
  lcd.setCursor(0,0);
  lcd.print("Reaction Game!");
}

void resetRound(){
  lcd.setCursor(0, 1);
  lcd.print("         ");
  digitalWrite(ledPin, 0);
  digitalWrite(ledPin2, 0);
  rando = random(3,7);
  lastReset = millis();
  roundOver = false;
}

void loop() {
  if(digitalRead(resetBtn) && ((millis() - lastReset) > 1000)){
   resetRound();
  }

  if(roundOver){
    return;
  }

  player1 = analogRead(playerOnePin);
  player2 = analogRead(playerTwoPin);

  // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
  lcd.setCursor(0, 1);
  // print the number of seconds since reset:
  long countDown = numMillis-millis()+lastReset;
  if(countDown > rando*1000) {
    lcd.print(countDown);
  }
  else {
    lcd.print("????");
  }

  if (player1 > THRESHOLD){
    if (countDown > 0){
      endRound(2, countDown);
      digitalWrite(ledPin2, 1);
    }
    else{
      endRound(1, countDown);
      digitalWrite(ledPin, 1);
    }
  }
  if (player2 > THRESHOLD){
    if (countDown > 0){
      endRound(1, countDown);
      digitalWrite(ledPin, 1);
    }
    else{
      endRound(2, countDown);
      digitalWrite(ledPin2, 1);
    }
  }
}

void endRound(int player, int countdown){
  roundOver = true;
  //lcd.clear();
  lcd.setCursor(0, 1);
  lcd.print("         ");
  lcd.setCursor(0,1);
  lcd.print(countdown);
  lcd.setCursor(0,1);
  //String str = "Player " + player;// + " wins!";
  //lcd.print(str);
}