const int analogPin = A0;
const int ledCount[6][7]{{1,1,1,1,1,1,0},
                         {0,1,1,0,0,0,0},
                         {1,1,0,1,1,0,1},
                         {1,1,1,1,0,0,1},
                         {0,1,1,0,0,1,1},
                         {1,0,1,1,0,1,1},

                      };
int num_10bit,num_05;
int ledPins[] = {2,3,4,5,6,7,8};

void setup(){
  for (int thisLed = 2; thisLed < ledPins; thisLed++){
    pinMode(ledPins[thisLed],OUTPUT);
  }
}
void loop(){
  num_10bit=analogRead(analogPin);
  num_05=map(num_10bit,0,1023,0,5);
  seven_display();
}
void seven_display(){
  for (int thisLed = 0; thisLed<7; thisLed++){
    digitalWrite(ledPins[thisLed],ledCount[num_05][thisLed]);
  }
}