int button_pin = 12;
int counter = 0;
int button_current_value, button_old_value;
int a = 2; int b = 3;
int c = 5; int d = 6;
int e = 7; int f = 9;
int g = 8; int dp = 4;

// Define RGB LED pins
int redPin = 10;
int greenPin = 11;
int bluePin = 13;

void setup() {
  pinMode(button_pin, INPUT_PULLUP);
  Serial.begin(9600);
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(dp, OUTPUT);

  // Initialize RGB LED pins
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  readButton();
  showNum(counter % 10);
  setColor(counter % 10);
}

void readButton() {
  button_current_value = !digitalRead(button_pin);
  if (button_current_value == 0 && button_old_value == 1) {
    counter++;
    Serial.println(counter);
  } else {
    delay(50);
  }
  button_old_value = button_current_value;
}

void showNum(int num) {
  switch (num) {
    case 0: zero(); break;
    case 1: one(); break;
    case 2: two(); break;
    case 3: three(); break;
    case 4: four(); break;
    case 5: five(); break;
    case 6: six(); break;
    case 7: seven(); break;
    case 8: eight(); break;
    case 9: nine(); break;
  }
}

void setColor(int num) {
  switch (num) {
    case 0: analogWrite(redPin, 255); analogWrite(greenPin, 0); analogWrite(bluePin, 0); break; // Red
    case 1: analogWrite(redPin, 0); analogWrite(greenPin, 255); analogWrite(bluePin, 0); break; // Green
    case 2: analogWrite(redPin, 0); analogWrite(greenPin, 0); analogWrite(bluePin, 255); break; // Blue
    case 3: analogWrite(redPin, 255); analogWrite(greenPin, 255); analogWrite(bluePin, 0); break; // Yellow
    case 4: analogWrite(redPin, 0); analogWrite(greenPin, 255); analogWrite(bluePin, 255); break; // Cyan
    case 5: analogWrite(redPin, 255); analogWrite(greenPin, 0); analogWrite(bluePin, 255); break; // Magenta
    case 6: analogWrite(redPin, 255); analogWrite(greenPin, 255); analogWrite(bluePin, 255); break; // White
    case 7: analogWrite(redPin, 127); analogWrite(greenPin, 0); analogWrite(bluePin, 127); break; // Purple
    case 8: analogWrite(redPin, 127); analogWrite(greenPin, 127); analogWrite(bluePin, 0); break; // Orange
    case 9: analogWrite(redPin, 0); analogWrite(greenPin, 127); analogWrite(bluePin, 127); break; // Aqua
  }
}

void one() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void two() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, LOW);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}

void three() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, HIGH);
}

void four() {
  digitalWrite(a, LOW);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void five() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void six() {
  digitalWrite(a, HIGH);
  digitalWrite(b, LOW);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void seven() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, LOW);
  digitalWrite(e, LOW);
  digitalWrite(f, LOW);
  digitalWrite(g, LOW);
}

void eight() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void nine() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, LOW);
  digitalWrite(f, HIGH);
  digitalWrite(g, HIGH);
}

void zero() {
  digitalWrite(a, HIGH);
  digitalWrite(b, HIGH);
  digitalWrite(c, HIGH);
  digitalWrite(d, HIGH);
  digitalWrite(e, HIGH);
  digitalWrite(f, HIGH);
  digitalWrite(g, LOW);
}