/*
INFO:

a= 7
b = 6
c= 4
d= 2
e= 3
f=9
g= 10


Low => شغال
High - > طافي

*/

int counter = 0;  
bool countingDirection = true;  

void setup() {
   
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  showNumber(counter);
}

void loop() {
  delay(1000);  
  if(countingDirection){
    counter++;
    if(counter == 9)
    {
        countingDirection = false;
    }
  }
  else{
      counter--;
      if(counter == 0){
          countingDirection = true;
      }
    }
  showNumber(counter);
}

void showNumber(int num) {
  switch (num) {
    case 0: show0(); break;
    case 1: show1(); break;
    case 2: show2(); break;
    case 3: show3(); break;
    case 4: show4(); break;
    case 5: show5(); break;
    case 6: show6(); break;
    case 7: show7(); break;
    case 8: show8(); break;
    case 9: show9(); break;
  }
}

void show0() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void show1() {
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW); // e1
  digitalWrite(4, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void show2() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW); // e1 /
  digitalWrite(4, HIGH);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void show3() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, LOW);
}

void show4() {
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}

void show5() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}

void show6() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, HIGH);
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}

void show7() {
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH); // e1 /
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);
}

void show8() {
  digitalWrite(2, LOW);
  digitalWrite(3, LOW); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}

void show9() {
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH); // e1
  digitalWrite(4, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
}