/*
    74HC595 Pins:
        Pin 14 (DS) -> Arduino pin 11 (Data)
        Pin 11 (SH_CP) -> Arduino pin 12 (Clock)
        Pin 12 (ST_CP) -> Arduino pin 8 (Latch)
        Pin 10 (MR) -> 5V (Master Reset, active low, so we connect it to 5V to disable reset)
        Pin 13 (OE) -> GND (Output Enable, active low, so we connect it to GND to enable outputs)
        Pin 16 (VCC) -> 5V
        Pin 8 (GND) -> GND

    RGB LED Connections:
        Connect the anodes (long leg) of the RGB LEDs to a current-limiting resistor (typically 220 ohms) and then to 5V.
        Connect the cathodes (R, G, B legs) of the RGB LEDs to the output pins of the 74HC595 shift register. For example:
            Q0 -> Red of LED1
            Q1 -> Green of LED1
            Q2 -> Blue of LED1
            Q3 -> Red of LED2
            Q4 -> Green of LED2
            Q5 -> Blue of LED2
*/


// Define connections to 74HC595
#define DATA_PIN1 13  // DS
#define CLOCK_PIN1 11 // SH_CP
#define LATCH_PIN1 12  // ST_CP

#define DATA_PIN2 10  // DS
#define CLOCK_PIN2 8 // SH_CP
#define LATCH_PIN2 9  // ST_CP


const byte color1[]{
  B00000001,
  B00000010,
  B00000100,
  B00000011,
  B00000101,
  B00000110
};

const byte color2[]{
   B00001000,
   B00010000,
   B00100000,
   B00011000,
   B00101000,
   B00110000
};

const byte color3[]{
  B00000001,
  B00000010,
  B00000100,
  B00000011,
  B00000101,
  B00000110
};

const byte color4[]{
   B00001000,
   B00010000,
   B00100000,
   B00011000,
   B00101000,
   B00110000
};


void setup() {
  // Set pin modes
  pinMode(DATA_PIN1, OUTPUT);
  pinMode(CLOCK_PIN1, OUTPUT);
  pinMode(LATCH_PIN1, OUTPUT);

   pinMode(DATA_PIN2, OUTPUT);
  pinMode(CLOCK_PIN2, OUTPUT);
  pinMode(LATCH_PIN2, OUTPUT);

}




void loop() {

   for (int i = 0; i < 6; i++) {
  byte color = color1[i] | color2[i];
  updateShiftRegister (color);
    delay(500);
    }

       for (int i = 0; i < 2; i++) {
  byte color = color3[i] | color4[i];
  updateShiftRegister (color);
    delay(500);
    }
}


void updateShiftRegister(byte color) {
  digitalWrite(LATCH_PIN1, LOW);
  shiftOut(DATA_PIN1, CLOCK_PIN1, MSBFIRST, color);
  digitalWrite(LATCH_PIN1, HIGH);

  digitalWrite(LATCH_PIN2, LOW);
  shiftOut(DATA_PIN2, CLOCK_PIN2, MSBFIRST, color);
  digitalWrite(LATCH_PIN2, HIGH);
}