/* Song chosen: What is Love
   Time frame: 0:00 to 0:23*/

// use the FastLED library (someone's pre-written code)
#include <FastLED.h>

// set how many LEDs there are and the data pin.
const int numLeds = 30;
const int ledStripPin = 6;
const int oneBeat = 484;
const int halfBeat = oneBeat / 2;

// this creates an array to reference our LEDs
CRGB leds[numLeds];

void setup() {
  // tells the FastLED code e.g. what LEDs we are using, the data pin
  FastLED.addLeds<NEOPIXEL, ledStripPin>(leds, numLeds);

  // limit the strip's draw to 400mA at 5v
  FastLED.setMaxPowerInVoltsAndMilliamps(5, 400);

  // turns the brightness down (so my eyes don't hurt)
  FastLED.setBrightness(8);

  pinMode(2, INPUT_PULLUP);
}

void loop() {
  if (digitalRead(2) == LOW) {
    delay(halfBeat);
    firstPhrase();
    backgroundBeat();
  }
}

void firstPhrase () {
  fourWordPhrase();
  threeWordPhrase();
  phraseEnding();
}

void backgroundBeat () {
  beatSequence();
}

void allBlack () {
  //basic for loop
  for (int i = 0; i < 30; i ++) {
    leds[i].setRGB (0, 0, 0);
  }
  FastLED.show();
}

void fourWordPhrase () {
  for (int i = 0; i < 10; i++) {
    leds[i] = CRGB::White;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 10; i++) {
    leds[20 + i] = CRGB::Blue;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 10; i++) {
    leds[10 + i] = CRGB::Purple;
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
  for (int i = 0; i < 15; i++) {
    leds[14 - i] = CRGB::Yellow;
    leds[15 + i] = CRGB::Purple;
    FastLED.show();
    delay(oneBeat / 15);
  }
  delay(oneBeat);
  allBlack();
  FastLED.show();
  delay(halfBeat - oneBeat / 15);
  //increment for loop
  for (int i = 0; i < 30; i += 2) {
    if ((i % 4) == 0) {
      leds[i] = CRGB::Green;
    }
    else {
      leds[i] = CRGB::Red;
    }
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
  for (int i = 0; i < 30; i += 2) {
    if ((i % 4) == 0) {
      leds[1 + i] = CRGB::Purple;
    }
    else {
      leds[1 + i] = CRGB::White;
    }
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
  for (int i = 0; i < 30; i += 2) {
    if ((i % 4) == 0) {
      leds[i] = CRGB::Blue;
    }
    else {
      leds[i] = CRGB::Yellow;
    }
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
}

void threeWordPhrase () {
  //mini repeated pattern for loop
  for (int i = 0; i < 13; i++) {
    leds[i] = CRGB::Purple;
    leds[i + 1] = CRGB::Purple;
    leds[i + 2] = CRGB::Purple;
    leds[i - 1] = CRGB::Black;
    leds[29 - i] = CRGB::Purple;
    leds[28 - i] = CRGB::Purple;
    leds[27 - i] = CRGB::Purple;
    leds[30 - i] = CRGB::Black;
    FastLED.show();
    delay(halfBeat / 7.5);
  }
  //contains reversing direction in for loop
  for (int i = 0; i < 13; i++) {
    leds[14 - i] = CRGB::Purple;
    leds[13 - i] = CRGB::Purple;
    leds[12 - i] = CRGB::Purple;
    leds[15 - i] = CRGB::Black;
    leds[15 + i] = CRGB::Purple;
    leds[16 + i] = CRGB::Purple;
    leds[17 + i] = CRGB::Purple;
    leds[14 + i] = CRGB::Black;
    FastLED.show();
    delay(halfBeat / 7.5);
  }
  allBlack();
  for (int i = 0; i < 30; i += 3) {
    leds[i] = CRGB::Red;
  }
  for (int i = 1; i < 30; i += 3) {
    leds[i] = CRGB::Blue;
  }
  for (int i = 2; i < 30; i += 3) {
    leds[i] = CRGB::Yellow;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 30; i += 3) {
    leds[i] = CRGB::Yellow;
  }
  for (int i = 1; i < 30; i += 3) {
    leds[i] = CRGB::Red;
  }
  for (int i = 2; i < 30; i += 3) {
    leds[i] = CRGB::Blue;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 30; i += 3) {
    leds[i] = CRGB::Blue;
  }
  for (int i = 1; i < 30; i += 3) {
    leds[i] = CRGB::Yellow;
  }
  for (int i = 2; i < 30; i += 3) {
    leds[i] = CRGB::Red;
  }
  FastLED.show();
  delay(oneBeat);
  allBlack();
}

void phraseEnding() {
  for (int i = 1; i < 30; i += 2) {
    leds[i] = CRGB::Purple;
  }
  for (int i = 0; i < 30; i += 2) {
    leds[i] = CRGB::Blue;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 1; i < 30; i += 2) {
    leds[i] = CRGB::Blue;
  }
  for (int i = 0; i < 30; i += 2) {
    leds[i] = CRGB::Purple;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 1; i < 30; i += 2) {
    leds[i] = CRGB::Purple;
  }
  for (int i = 0; i < 30; i += 2) {
    leds[i] = CRGB::Blue;
  }
  FastLED.show();
  delay(oneBeat * 2);
  for (int i = 0; i < 15; i++) {
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 15; i++) {
    leds[15 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat * 4 + halfBeat);
}

void beatSequence () {
  for (int i = 0; i < 30; i++) {
    leds[i] = CRGB::Green;
    FastLED.show();
    delay(oneBeat / 30);
  }
  for (int i = 0; i < 30; i++) {
    leds[29 - i] = CRGB::Red;
    FastLED.show();
    delay(oneBeat / 30);
  }
  for (int i = 0; i < 8; i++) {
    leds[8 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat / 4 * 3);
  for (int i = 0; i < 8; i++) {
    leds[16 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 8; i++) {
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 8; i++) {
    leds[24 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 8; i++) {
    leds[8 + i] = CRGB::Yellow;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 8; i++) {
    leds[16 + i] = CRGB::Green;
  }
  FastLED.show();
  delay(oneBeat / 4 * 3);
  for (int i = 0; i < 8; i++) {
    leds[i] = CRGB::Purple;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 8; i++) {
    leds[24 + i] = CRGB::Blue;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 15; i++) {
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 20; i++) {
    leds[15 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat / 4 * 3);
  //random for loop
  for (int i = 0; i < 20; i++) {
    int ran = random(0, 30);
    leds[ran] = CRGB::Yellow;
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
  for (int i = 0; i < 20; i++) {
    int ran = random(0, 30);
    leds[ran] = CRGB::Blue;
  }
  FastLED.show();
  delay(halfBeat);
  allBlack();
  for (int i = 0; i < 20; i++) {
    int rand = random(0, 30);
    leds[rand] = CRGB::Green;
    FastLED.show();
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 15; i++) {
    leds[i] = CRGB::Red;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 15; i++) {
    leds[15 + i] = CRGB::Blue;
  }
  FastLED.show();
  delay(4 * oneBeat);
  allBlack();
  for (int i = 0; i < 30; i += 2) {
    leds[i] = CRGB::Yellow;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 30; i += 2) {
    leds[i + 1] = CRGB::Purple;
  }
  FastLED.show();
  delay(oneBeat);
  for (int i = 0; i < 10; i++) {
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(oneBeat / 4 * 3);
  for (int i = 0; i < 10; i++) {
    leds[20 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 10; i++) {
    leds[10 + i] = CRGB::Black;
  }
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 10; i++) {
    leds[i] = CRGB::Green;
    FastLED.show();
    delay(oneBeat / 20);
  }
  delay(oneBeat - halfBeat);
  for (int i = 0; i < 10; i++) {
    leds[29 - i] = CRGB::Green;
    FastLED.show();
    delay(oneBeat / 20);
  }
  delay(oneBeat - halfBeat);
  for (int i = 0; i < 4; i++) {
    leds[16 + i] = CRGB::Blue;
  }
  FastLED.show();
  delay(oneBeat / 4 * 3);
  for (int i = 0; i < 4; i++) {
    leds[10 + i] = CRGB::Blue;
  }
  FastLED.show();
  delay(halfBeat);
  leds[14] = CRGB::Yellow;
  leds[15] = CRGB::Yellow;
  FastLED.show();
  delay(halfBeat);
  for (int i = 0; i < 30; i++) {
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(oneBeat / 30);
  }
  for (int i = 0; i < 30; i++) {
    leds[29 - i] = CRGB::Purple;
    FastLED.show();
    delay(oneBeat / 30);
  }
  delay(halfBeat);
}