int digit[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0xFF,0x6F};
int num;
int buttonPin =8;
void setup() {
  for(int x=0;x<7;x++){
    pinMode(x, OUTPUT);
  }
  randomSeed(analogRead(A0));
  num = random(0,4);
  pinMode(buttonPin, INPUT_PULLUP);

}

void loop() {
  int button = digitalRead(buttonPin);
  if(button == 0){
    num ++;
    delay(400);
    if (num >= 9){
      num = 9;
    }
  }
  int k = digit[num];
  for(int x = 0;x< 7;x++){
    int temp = k & 0x01;
    digitalWrite(x,temp);
    k = k >>1;
  }
  

}