#define SEG_COUNT 7 
const int firstSeg = 2;

const byte numberSegments[16] = {
 0b11000000, //0
 0b11111001, //1
 0b10100100, //2
 0b10110000, //3
 0b10011001, //4
 0b10010010, //5
 0b10000010, //6
 0b11111000, //7
 0b10000000, //8
 0b10010000, //9
 0b00001000, //A 
 0b00000011, //b 
 0b01000110, //C 
 0b00100001, //d 
 0b00000110, //E 
 0b00001110, //F
};

int lastButton = LOW;
int curButton = LOW;

const int button = 12;

int debounce (int last)
{
  int current = digitalRead(button);
  if(last != current)
  {
    delay(5);
    current = digitalRead(button);
  }
  return current;
}

void Clicked(int &count){
  curButton = debounce (lastButton);
  if(lastButton == HIGH && curButton == LOW)
  {
    Serial.println(count);
    count++;
    if(count == 16){
      count = 0;
    }
  }
  lastButton = curButton;
}

void setup() {
  Serial.begin(9600);
  for (int i = 0; i < SEG_COUNT; ++i){
    pinMode(i + firstSeg, OUTPUT);
  }
  pinMode(button, INPUT);
  digitalWrite(button, HIGH);
}

void loop() {  
  int mask;
  boolean enableSegment;
  static int count = 0;

  Clicked(count);

  mask = numberSegments[count];
  for (int i = 0; i < SEG_COUNT; i++)
  {
    enableSegment = bitRead(mask, i);
    digitalWrite(i + firstSeg, enableSegment);
  }

}