#include <LiquidCrystal.h>


const int rs = 11, en = 10, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

byte dauer;
long startZeit;
int reaktionsZeit;
int GLED = 8;
int RLED = 7;
int Taster = 12;


void setup() {
  Serial.begin(9600);
  pinMode(GLED, OUTPUT);
  pinMode(RLED, OUTPUT);
  pinMode(Taster, INPUT);
}

void loop() {
  dauer = random(2,5);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Push Button");
  delay(500);
    do{
    digitalRead(Taster) == HIGH;
    delay(50);
    lcd.clear();
    lcd.setCursor(0, 0);
    digitalWrite(GLED, HIGH);
    lcd.print("redLED on, push");

    while(digitalRead(Taster) == HIGH){
      
      delay(1000);
      //delay(dauer * 1000);


      if (digitalRead(Taster) == HIGH){
        Serial.println("Fehler");
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Fruehstart");
        delay(1000);
        lcd.clear();
        lcd.setCursor(0, 0);
        digitalWrite(GLED, HIGH);
        lcd.print("secondChance");
        delay(1000);
       }   
       else
  {  
    delay(dauer * 1000);
    digitalWrite (GLED, LOW);
    digitalWrite (RLED, HIGH);
    startZeit = millis();
}

    while(digitalRead(Taster) == HIGH);
    {
      reaktionsZeit = millis() - startZeit;
      digitalWrite (RLED, LOW);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("reactionTime ");
      lcd.print(reaktionsZeit);
      lcd.println(" ms");
      delay(1000);
    }
  }
  }
  }