/*
  Author: Elena C. K.
  Description: Attiny84 to control DotStar LED strip from Adafruit. It only have enough byte to control approximately 32 LEDs.
  Use the FastLED library to program.
  IDE Attiny84 Physical Pin
  0      PA0           13
  1      PA1           12
  2      PA2           11 - OPAMP OUT
  3      PA3           10
  4      PA4            9
  5      PA5            8
  6      PA6            7
  7      PA7            6 - D1
  8      PB2            5 - C1
  9      PB1            3
  10      PB0            2
*/

#include <FastLED.h>
#define NUM_LEDS 72
//#define NUM_LEDS 144
#define DATA_PIN 7
#define CLOCK_PIN 8

CRGB leds[NUM_LEDS];

void setup() {
  // put your setup code here, to run once:
  FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN>(leds, NUM_LEDS);
  FastLED.clear();
}

void loop() {
  firstLight();
}

void threeLED() {
  // put your main code here, to run repeatedly:
  for (int i = 0; i < NUM_LEDS - 1; i++) {
    leds[i] = CRGB::Red;
    leds[i + 1] = CRGB::Red;
    FastLED.delay(10);
    leds[i] = CRGB::Black;
    leds[i + 1] = CRGB::Black;
  }
}

void firstLight() {
  for (int whiteLed = 0; whiteLed < NUM_LEDS; whiteLed = whiteLed + 1) {
    // Turn our current led on to white, then show the leds
    leds[whiteLed] = CRGB::White;

    // Show the leds (only one of which is set to white, from above)
    FastLED.show();

    // Wait a little bit
    delay(100);

    // Turn our current led back to black for the next loop around
    leds[whiteLed] = CRGB::Black;
  }
}