//STAR - Ver.1.00
//2024-10-16

int pins[] = {23, 22, 32, 33, 25, 26, 27, 14, 12, 13, 15, 2, 0, 4, 16, 17, 19, 18, 5, 21};
int arrlength;

int mode = 3;

void setup() {
  arrlength = sizeof(pins) / sizeof(int);

  for (int i=0; i<arrlength; i++)
  {
    pinMode(pins[i], OUTPUT);
    digitalWrite(pins[i], LOW);
  }
}

void loop() {
  switch (mode)
  {
    case 0:
      full();
      break;
    case 1:
      circle();
      break;
    case 2:
      halfcircle();
      break;
    case 3:
      blinkingtips();
      break;
    case 4:
      everysecond();
      break;
    case 5:
      rotatingspikes();
      break;
    case 6:
      topbottom();
      break;
    default:
      break;
  }
  delay(10);
}

void ledSwitch(int led, int mode)
{
  digitalWrite(pins[led], mode);
}

void full()
{
  for (int i=0; i<arrlength; i++)
  {
    ledSwitch(i, HIGH);
  }
}

void reset()
{
  for (int i=0; i<arrlength; i++)
  {
    ledSwitch(i, LOW);
  }
}

void circle()
{
  int timeout = 200;
  for (int i=0; i<arrlength; i++)
  {
    ledSwitch(i, HIGH);
    delay(timeout);
    ledSwitch(i, LOW);
  }
}

void halfcircle()
{
  int timeout = 200;
  int half = arrlength / 2;
  int halfindex;
  for (int i=0; i<arrlength; i++)
  {
    ledSwitch(i, HIGH);
    halfindex = i + half;
    if (halfindex > arrlength)
    {
      halfindex -= arrlength;
    }
    ledSwitch(halfindex, HIGH);
    delay(timeout);
    ledSwitch(i, LOW);
    ledSwitch(halfindex, LOW);
  }
}

void blinkingtips()
{
  int timeout = 400;
  for (int i=0; i<arrlength; i+=4)
  {
    ledSwitch(i, LOW);
    ledSwitch(i+1, LOW);
    ledSwitch(i+2, HIGH);
  }
  delay(timeout);
  for(int i=0; i<arrlength; i+=4)
  {
    ledSwitch(i, LOW);
    ledSwitch(i+2, LOW);
    ledSwitch(i+1, HIGH);
    ledSwitch(i+3, HIGH);
  }
  delay(timeout);
  for (int i=0; i<arrlength; i+=4)
  {
    ledSwitch(i, HIGH);
    ledSwitch(i+1, LOW);
    ledSwitch(i+3, LOW);
  }
  delay(timeout);
}

void everysecond()
{
  int timeout = 500;
  for (int i=0; i<arrlength; i+=2)
  {
    ledSwitch(i, HIGH);
    ledSwitch(i+1, LOW);
  }
  delay(timeout);
  for (int i=0; i<arrlength; i+=2)
  {
    ledSwitch(i, LOW);
    ledSwitch(i+1, HIGH);
  }
  delay(timeout);
}

void rotatingspikes()
{
  int timeout = 400;
  int pin;
  for (int i=0; i<arrlength; i+=4)
  {
    switchspike(i, HIGH);
    delay(timeout);
    switchspike(i, LOW);
  }
}

void switchspike(int i, int onoff)
{
  int pin;
  for (int j=i+2; j<i+7; j++)
  {
    pin = j;
    if (pin >= arrlength)
    {
      pin -= arrlength;
    }
    ledSwitch(pin, onoff);
  }
}

void topbottom()
{
  int timeout = 300;

  int arr_0[] = {0, -1, -1, -1, -1, -1};
  int arr_1[] = {1, 19, -1, -1, -1, -1};
  int arr_2[] = {2, 3, 4, 16, 17, 18};
  int arr_3[] = {5, 15, -1, -1, -1, -1};
  int arr_4[] = {6, 14, -1, -1, -1, -1};
  int arr_5[] = {7, 13, -1, -1, -1, -1};
  int arr_6[] = {8, 12, -1, -1, -1, -1};
  int arr_7[] = {9, 11, -1, -1, -1, -1};
  int arr_8[] = {10, -1, -1, -1, -1, -1};

  int* arr_c[] = {arr_0, arr_1, arr_2, arr_3, arr_4, arr_5, arr_6, arr_7, arr_8};

  int l = sizeof(arr_c) / sizeof(arr_c[0]);

  for (int i=0; i<l; i++)
  {
    arrSwitch(arr_c[i], HIGH);
    delay(timeout);
    arrSwitch(arr_c[i], LOW);
  }
}

void arrSwitch(int arr[], int onoff)
{
  int l = sizeof(arr) + 2;

  for (int i=0; i<l; i++)
  {
    if (arr[i] != -1)
    {
      ledSwitch(arr[i], onoff);
    }
  }
}