#include <LiquidCrystal.h> 
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int LEDR = 8; 
int LEDB = 7; 
int LEDGr= 6; 
int Button = 9;

int COLOR;
int Beep;
int PSE;
int TME;
int RTME = 0;


void setup() { 
  lcd.begin(16, 2);
  pinMode(LEDR, OUTPUT);
  // Set LED pins as output
  pinMode(LEDB, OUTPUT);
  pinMode(LEDGr, OUTPUT);
  pinMode(Button, INPUT); 
  digitalWrite(LEDR, LOW);
  digitalWrite(LEDB, LOW);
  digitalWrite(LEDGr, LOW);

}

void loop() {
  lcd.clear(); 
  lcd.print ("Hold Button to"); 
  lcd.setCursor(0, 1);
  lcd.print("start.");
  while (digitalRead(Button) == LOW) { 
    tone(13, 1200, 30);
    delay(1400);
    noTone(13);
  }
  lcd.clear();
  digitalWrite(LEDR, HIGH); 
  digitalWrite(LEDB, HIGH);
  digitalWrite(LEDGr, HIGH);
  randomSeed (analogRead (0)); 
  COLOR = random(1, 4);
  PSE = random(500, 1200);
  while (COLOR != 1 && digitalRead(Button) == HIGH) { 
    digitalWrite(LEDGr, HIGH);  
    digitalWrite(LEDB, HIGH); 
    delay(PSE);
    randomSeed (analogRead(0));
    Beep = random(1, 4); 
    PSE = random(750, 1200); 

    if (Beep == 1) {
      tone(13, 1600, 350);
      delay(750);
      noTone(13);
    }
    if (COLOR== 2) {
      digitalWrite(LEDGr, LOW);
    }
    if (COLOR== 3) {
      digitalWrite(LEDB, LOW);
    }
    delay(PSE);
    randomSeed (analogRead(0));
    COLOR = random(1, 4); // Select random color
  }
// Execute this loop if color is red
if (COLOR== 1 && digitalRead(Button) == HIGH) { 
  digitalWrite(LEDGr, HIGH);
  digitalWrite(LEDB, HIGH);
  delay(PSE);
  TME= millis();
  digitalWrite(LEDR, LOW);

  while (digitalRead(Button) == HIGH) { 
    delay(1);
  }

  lcd.display();
  RTME = millis() - TME; 
  lcd.print("Reaction Time:"); 
  lcd.setCursor(0, 1);
  lcd.print(RTME);
}

  if(COLOR != 1){
    lcd.print("Realeased too");
    lcd.setCursor(0,1);
    lcd.print("soon!!!");
    tone(13, 3000, 1500);
    delay(500);
    noTone(13);
  }

  while(digitalRead(Button) == LOW){
    delay(10);
  }

  digitalWrite(LEDR, LOW);
  digitalWrite(LEDR, LOW);
  digitalWrite(LEDR, LOW);
  lcd.clear();
  lcd.print("Hold button to");
  lcd.setCursor(0,1);
  lcd.print("start.");
  int Time = 0;
  delay(1000);
}