int num = 0;
int onState = 0;
int A = 2;
int B = 3;
int C = 4;
int D = 5;
int E = 6;
int F = 7;
int G = 8;
int middlepushB = 10;
int buttonStateM;

void setup()
{
  Serial.begin(9600);
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(middlepushB, INPUT);
}
void loop()
{
  int ranNum = random(0,9);
  numDis(num);
  buttonStateM = digitalRead(middlepushB);
  if (num < 0){
    num = 9;
  }
  if (num > 9){
    num = 0;
  }
  if (buttonStateM == HIGH && onState == 0){
    ranNum = random(0,9);
    onState = 1;
    delay(500);
    Serial.println("random number: ");
    Serial.println(ranNum);
    Serial.println("Selected number: ");
    Serial.println(num);
    disOff();
    delay (1000);
    numDis(ranNum);
    delay(1000);
    if (ranNum == num){
      for (int i = 0; i <= 9; i++){
        numDis(i);
        delay(100);
      }
      delay(500);
      disOff();
    }
    delay(355);
    onState = 0;
  
  }
  Serial.println(num);
}
int disOff(){
  digitalWrite(A, LOW);
  digitalWrite(B, LOW);
  digitalWrite(C, LOW);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, LOW);
}
int numDis(int x){
  if (x == 0){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, LOW);
  }else if (x == 1){
      digitalWrite(A, LOW);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
   	  digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
  }else if (x == 2){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, LOW);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, LOW);
      digitalWrite(G, HIGH);
  }else if (x == 3){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, HIGH);
  }else if (x == 4){
      digitalWrite(A, LOW);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
  }else if (x == 5){
      digitalWrite(A, HIGH);
      digitalWrite(B, LOW);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, LOW);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
  }else if (x == 6){
      digitalWrite(A, HIGH);
      digitalWrite(B, LOW);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
  }else if (x == 7){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, LOW);
      digitalWrite(E, LOW);
      digitalWrite(F, LOW);
      digitalWrite(G, LOW);
  }else if (x == 8){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, HIGH);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
  }else if (x == 9){
      digitalWrite(A, HIGH);
      digitalWrite(B, HIGH);
      digitalWrite(C, HIGH);
      digitalWrite(D, HIGH);
      digitalWrite(E, LOW);
      digitalWrite(F, HIGH);
      digitalWrite(G, HIGH);
  }
}