void showNumber(int x) {
  digitalWrite(1,HIGH);
  digitalWrite(2,HIGH);
  digitalWrite(3,HIGH);
  digitalWrite(4,HIGH);
  digitalWrite(5,HIGH);
  digitalWrite(6,HIGH);
  digitalWrite(7,HIGH);

  if (x == 0) {//0
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(5, LOW); //e
    digitalWrite(6, LOW); //f
  }
  if (x == 1) {//1
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
  }
  if (x == 2) {//2
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(4, LOW); //d
    digitalWrite(5, LOW); //e
    digitalWrite(7, LOW); //g
  }
  if (x == 3) {//3
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(7, LOW); //g
  }
  if (x == 4) {//4
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(6, LOW); //f
    digitalWrite(7, LOW); //g
  }
  if (x == 5) {//5
    digitalWrite(1, LOW); //a
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(6, LOW); //f
    digitalWrite(7, LOW); //g
  }
  if (x == 6) {//6
    digitalWrite(1, LOW); //a
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(5, LOW); //e
    digitalWrite(6, LOW); //f
    digitalWrite(7, LOW); //g
  }
  if (x == 7) {//7
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(6, LOW); //f
  }
  if (x == 8) {//8
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(5, LOW); //e
    digitalWrite(6, LOW); //f
    digitalWrite(7, LOW); //g
  }
  if (x == 9) {//9
    digitalWrite(1, LOW); //a
    digitalWrite(2, LOW); //b
    digitalWrite(3, LOW); //c
    digitalWrite(4, LOW); //d
    digitalWrite(6, LOW); //f
    digitalWrite(7, LOW); //g
  }
  
}

void setup() {
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  //switch
  pinMode(8, INPUT_PULLUP); //ลด
  pinMode(9, INPUT_PULLUP); //เพิ่ม
  pinMode(10, INPUT_PULLUP); //รีค่า
}

int x = 0;
void loop() {
  if (digitalRead(8) == LOW ) {
    x--;
    delay(100);
    while (digitalRead(8) == LOW) {}
    delay(100);
    if (x == -1) {
      x = 9;
    }
  }
  if (digitalRead(9) == LOW ) {
    x++;
    delay(100);
    while (digitalRead(9) == LOW) {}
    delay(100);
    if (x == 10) {
      x = 0;
    }
  }
  if (digitalRead(10) == LOW ) {
    x = 0;
    delay(200);
  }
  showNumber(x);

}