#include <Wire.h>

#include "FastLED.h"

#define NUM_LEDS 8

// Data pin that led data will be written out over

#define DATA_PIN 15

// Clock pin only needed for SPI based chipsets when not using hardware SPI

//#define CLOCK_PIN 8

long lasttimeLED = ;

#define delayLED 10 //ms

long lasttimeCYC = ;

#define delayCYC 50 //ms

CRGB leds[NUM_LEDS];

bool thergbled[] = {, , };

bool changeflag = false;

bool i2cflag = false;

#define downrate 1

void setup() {

  Wire.begin(0x55);                // join i2c bus with address

  Wire.onReceive(receiveEvent); // register event

//  Serial.begin(9600);           // start serial for output

  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);  // init LED

}

void loop() {

  LED();

  CYC();

}

void LED() {

  if ((millis() - lasttimeLED) > delayLED) {

    lasttimeLED = millis();

//    for (int i = 0; i < 8; i++) {

//      leds[i] = CRGB(255 * thergbled[2], 255 * thergbled[1], 255 * thergbled[0]);

//    }

     if(i2cflag) {

      leds[] = CRGB( * thergbled[],  * thergbled[],  * thergbled[]);

      FastLED.show();

      i2cflag = false;

      changeflag = false; // skip CYC change since already update in this loop

    }

    else if(changeflag) {

      FastLED.show();

      changeflag = false;

    }

  }

}

void CYC() {

  if ((millis() - lasttimeCYC) > delayCYC) {

    lasttimeCYC = millis();

    for(int i=(NUM_LEDS-);i>=;i--) {

      leds[i] = CRGB(leds[i-].r *downrate , leds[i-].g *downrate, leds[i-].b *downrate );

//        leds[i+1] = leds[i];

    }

    changeflag = true;

  }

}

// function that executes whenever data is received from master

// this function is registered as an event, see setup()

void receiveEvent(int howMany) {

  while ( Wire.available() >=  ) { // loop through all but the last

    int ledreg = Wire.read(); // receive byte as a regid

    int ledval = Wire.read(); // receive byte as a ledcolorsonoff

//    Serial.print(ledreg, HEX);        // print the character

//    Serial.print(" : ");         // print the character

//    Serial.println(ledval, HEX);        // print the character

    switch (ledreg) {

      case 0x81:

        thergbled[] = ledval; // B

        break;

      case 0x82:

        thergbled[] = ledval; // G

        break;

      case 0x83:

        thergbled[] = ledval; // R

        i2cflag = true;

        break;

      default:

        break;

    }

  }

}