Arduino Crystal Ball Code (C++)

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

const int switchPin = 6;
int switchState = 0;
int prevSwitchState = 0;
int reply;

void setup() {
  lcd.begin(16, 2);

  pinMode(switchPin, INPUT);
  lcd.print("Ask the");
  lcd.setCursor(0, 1);
  lcd.print("Crystal Ball");
}

void loop() {
  switchState = digitalRead(switchPin);

  if (switchState != prevSwitchState) {
    if (switchState == LOW) {
      reply = random(8);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("The ball says:");
      lcd.setCursor(0, 1);

      switch (reply) {
        case 0:
          lcd.print("Yes");
          break;
        case 1:
          lcd.print("Probably");
          break;
        case 2:
          lcd.print("Certainly");
          break;
        case 3:
          lcd.print("Quite Possibly");
          break;
        case 4:
          lcd.print("Not So Sure");
          break;
        case 5:
          lcd.print("Ask again");
          break;
        case 6:
          lcd.print("No idea");
          break;
        case 7:
          lcd.print("No");
          break;
      }
    }
  }
}