electronic dice(switch program)

const int LedBlue = 6;
const int LedWhite = 7;
const int LedYellow = 4;
const int LedRed = 3;
const int LedRed1 = 11;
const int LedYellow1 = 9;
const int LedBlue1 = 8;
const int ButtonPin = 12;
bool  ReadValue = 0;
bool LastReadValue = 0;
int randomNum = 0;
bool Flag = 0;

void setup()
{
  pinMode (LedBlue, OUTPUT) ;
  pinMode (LedWhite, OUTPUT) ;
  pinMode (LedYellow, OUTPUT) ;
  pinMode (LedRed, OUTPUT) ;
  pinMode (LedRed1, OUTPUT) ;
  pinMode (LedYellow1, OUTPUT) ;
  pinMode (LedBlue1, OUTPUT) ;
  pinMode (ButtonPin, INPUT) ;
  Serial.begin(9600);
  randomSeed(analogRead(A0));
  digitalWrite (LedBlue, HIGH);
  digitalWrite (LedWhite, HIGH);
  digitalWrite (LedYellow, HIGH);
  digitalWrite (LedRed, HIGH);
  digitalWrite (LedRed1, HIGH);
  digitalWrite (LedYellow1, HIGH);
  digitalWrite (LedBlue1, HIGH);
  delay(20);

  digitalWrite (LedBlue, LOW);
  digitalWrite (LedWhite, LOW);
  digitalWrite (LedYellow, LOW);
  digitalWrite (LedRed, LOW);
  digitalWrite (LedRed1, LOW);
  digitalWrite (LedYellow1, LOW);
  digitalWrite (LedBlue1, LOW);
  delay(20);
}
boolean debounce(boolean last)
{
  boolean current = digitalRead(ButtonPin);
  if (last != current)
  {
    delay(5);
    current = digitalRead(ButtonPin);
  }
  return current;
}

void loop()
{
  ReadValue = debounce(LastReadValue) ;
  Serial.println(ReadValue);
  if (LastReadValue == LOW && ReadValue == HIGH)
  {
    randomNum = random (1, 7) ;
    Serial.println(randomNum);
    switch (randomNum)
    {
      case 1:
        digitalWrite (LedBlue, HIGH);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
      case 2:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, HIGH);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
      case 3:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, HIGH);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
      case 4:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, HIGH);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
      case 5:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, HIGH);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
      case 6:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, HIGH);
        digitalWrite (LedBlue1, LOW);
        break;
      default:
        digitalWrite (LedBlue, LOW);
        digitalWrite (LedWhite, LOW);
        digitalWrite (LedYellow, LOW);
        digitalWrite (LedRed, LOW);
        digitalWrite (LedRed1, LOW);
        digitalWrite (LedYellow1, LOW);
        digitalWrite (LedBlue1, LOW);
        break;
    }
  }
}