//https://www.rapidtables.com/convert/number/binary-to-decimal.html?x=1111100000
//https://ledcalculator.net/#p=5&v=3&c=10&n=1&o=w

#define DATA_PIN  2  // Pin connected to DS of 74HC595
#define LATCH_PIN 3  // Pin connected to STCP of 74HC595
#define CLOCK_PIN 4  // Pin connected to SHCP of 74HC595


uint16_t leds = 0;
uint8_t numLEDs = 10; //Increase or decrease for start number of LEDS

void ledDisplay() {
  randomSeed(A0);
  leds = 0;        // Initially turns all the LEDs off, by giving the variable 'leds' the value 0
  updateShiftRegister();
  delay(500);
  for (int i = 0; i < numLEDs; i++) // Turn all the LEDs ON one by one.
  {
    bitSet(leds, i);                // Set the bit that controls that LED in the variable 'leds'
    updateShiftRegister();
    delay(100);
  }
  for (int i = numLEDs; i > 0; i--) // Turn all the LEDs OFF one by one.
  {
    bitClear(leds, i - 1);                // Set the bit that controls that LED in the variable 'leds'
    updateShiftRegister();
    delay(100);
  }
  for (int i = numLEDs; i > 0; i--)        
  {
    bitSet(leds, i - 1);                
    updateShiftRegister();
    delay(100);
  }
  for (int i = 0; i < numLEDs; i++)        
  {
    bitClear(leds, i);                
    updateShiftRegister();
    delay(100);
  }
  for (int i = 0; i < numLEDs; i++)
  {        
    bitSet(leds, i);               
    updateShiftRegister();
    bitClear(leds, i);
    delay(100);
  }
  for (int i = numLEDs; i > 0; i--)        
  {
    bitSet(leds, i - 1);               
    updateShiftRegister();
    bitClear(leds, i - 1);
    delay(100);
  }
  for (int i = 0; i < 50; i ++)
  {
    int j = random(0, 10);
    bitSet(leds, j);
    updateShiftRegister();
    bitClear(leds, j);
    delay(100);
  }

  for (int i = 0; i < 3; i ++) {
    leds = 341;
    updateShiftRegister();
    delay(300);
    leds = 682;
    updateShiftRegister();
    delay(300);
  }
  for (int i = 0; i < 3; i ++) {
    leds = 1023;
    updateShiftRegister();
    delay(300);
    leds = 0;
    updateShiftRegister();
    delay(300);
  }
  for (int i = 0; i < 3; i ++) {
    leds = 31;
    updateShiftRegister();
    delay(300);
    leds = 992;
    updateShiftRegister();
    delay(300);
  }
  leds = 0;
  updateShiftRegister();
}

void updateShiftRegister()
{
  digitalWrite(LATCH_PIN, LOW);
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, highByte(leds));
  shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, lowByte(leds));
  digitalWrite(LATCH_PIN, HIGH);
}

void setup() {

  pinMode(DATA_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);

}

void loop() {

  ledDisplay();
  delay(1000);

}