void setup() {
    //variables
    int number = 0;
    int button = 0;
    //select random seed
    randomSeed(analogRead(0));
    //inisiate LEDs
    pinMode(A0 , OUTPUT);
    pinMode(A1 , OUTPUT);
    pinMode(A2 , OUTPUT);
    pinMode(A3 , OUTPUT);
    pinMode(A4 , OUTPUT);
    pinMode(A5 , OUTPUT);
    pinMode(13 , OUTPUT);
    //inisiate button
    pinMode(2 , INPUT);
    //set LED low
    digitalWrite(A0, LOW);
    digitalWrite(A1, LOW);
    digitalWrite(A2, LOW);
    digitalWrite(A3, LOW);
    digitalWrite(A4, LOW);
    digitalWrite(A5, LOW);
    digitalWrite(13, LOW);
}
void loop() {
    int button = digitalRead(2);
    if(button == HIGH)
    {
    DisplayNumber();
    }
}



void DisplayNumber()
{
    //sets LEDs low at the begining of the loop
    digitalWrite(A0, LOW);
    digitalWrite(A1, LOW);
    digitalWrite(A2, LOW);
    digitalWrite(A3, LOW);
    digitalWrite(A4, LOW);
    digitalWrite(A5, LOW);
    digitalWrite(13, LOW);
    float number = random(1, 7);
    if(number == 1)
    {
        digitalWrite(A0, LOW);
        digitalWrite(A1, LOW);
        digitalWrite(A2, LOW);
        digitalWrite(A3, HIGH);
        digitalWrite(A4, LOW);
        digitalWrite(A5, LOW);
        digitalWrite(13, LOW);
    }
    if(number == 2)
    {
        digitalWrite(A0, HIGH);
        digitalWrite(A1, LOW);
        digitalWrite(A2, LOW);
        digitalWrite(A3, LOW);
        digitalWrite(A4, LOW);
        digitalWrite(A5, LOW);
        digitalWrite(13, HIGH);        
    }
    if(number == 3)
    {
        digitalWrite(A0, HIGH);
        digitalWrite(A1, LOW);
        digitalWrite(A2, LOW);
        digitalWrite(A3, HIGH);
        digitalWrite(A4, LOW);
        digitalWrite(A5, LOW);
        digitalWrite(13, HIGH);
    }
    if(number == 4)
    {
        digitalWrite(A0, HIGH);
        digitalWrite(A1, HIGH);
        digitalWrite(A2, LOW);
        digitalWrite(A3, LOW);
        digitalWrite(A4, LOW);
        digitalWrite(A5, HIGH);
        digitalWrite(13, HIGH);
    }
    if(number == 5)
    {
        digitalWrite(A0, HIGH);
        digitalWrite(A1, HIGH);
        digitalWrite(A2, LOW);
        digitalWrite(A3, HIGH);
        digitalWrite(A4, LOW);
        digitalWrite(A5, HIGH);
        digitalWrite(13, HIGH);
    }
    if(number == 6)
    {
        digitalWrite(A0, HIGH);
        digitalWrite(A1, HIGH);
        digitalWrite(A2, HIGH);
        digitalWrite(A3, LOW);
        digitalWrite(A4, HIGH);
        digitalWrite(A5, HIGH);
        digitalWrite(13, HIGH);
    }
    delay(1000);
    digitalWrite(A0, LOW);
    digitalWrite(A1, LOW);
    digitalWrite(A2, LOW);
    digitalWrite(A3, LOW);
    digitalWrite(A4, LOW);
    digitalWrite(A5, LOW);
    digitalWrite(13, LOW);
}