// lights and chars match up 1:1, in order
//              0  1  2   3   4   5   6   7   8
int lights[] = {2, 3, 9, 10, 11, A2, A3, A4, A5};

//                012345678
char letters[] = "noreghiut";

// how long we should wait before restarting the words
int waitBetweenLoops = 15000;
int easterEggCount = 30;

// Note that X, Y, and Z are used as indicators that the on and off time needs to change
char wordLetters[] = {"Xeghinortu  eghinortu  eghinortu  eghinortu  eghinortuY     no   right here   Zrun"};

// --- Final values

// each light, one at a time
int offTimeX = 100;
int onTimeX = 320;

// timing for the words
int offTimeY = 300;
int onTimeY = 600;

// timing for the final 'run'
int offTimeZ = 800;
int onTimeZ = 1700;

// ---

// init some vars because I don't know if there is GC
// add off and on times, just in case it doesn't get set later (but should get set later provided wordLetters starts with X)
int offTime = 300;
int onTime = 500;
char letter;

int lightCount;
int letterCount;

// counting the number of loops, for the easter egg
int loopCount;

void setup() {
  lightCount = sizeof(lights);
  letterCount = sizeof(wordLetters);
  loopCount = 0;

  // init lights
  for (int x = 0; x < lightCount; x++) {
    pinMode(lights[x], OUTPUT);
  }
}

// Finds the letter code assoicated with the letter (so we can map to a light)
int getLetterCode(char letter) {
  int off = 0;
  for (int i = 0; i < lightCount; i++) {
    if (letter == letters[i]) {
      off = lights[i];
      break;
    }
  }
  return off;
}

// Activate one light for the given on and off time
void activateLight(int theLight, int theOnTime, int theOffTime) {
  digitalWrite(theLight, HIGH);
  delay(theOnTime);
  digitalWrite(theLight, LOW);
  delay(theOffTime);
}

// Activate all lights for the given on and off time
void activateAllLights(int theOnTime, int theOffTime) {
  for (int i = 0; i < lightCount; i++) {
    digitalWrite(lights[i], HIGH);
  }
  delay(theOnTime);
  for (int i = 0; i < lightCount; i++) {
    digitalWrite(lights[i], LOW);
  }
  delay(theOffTime);
}

void loop() {
  // every once in awhile, turn all the lights on
  if (loopCount == easterEggCount) {
    for (int i = 0; i < 4; i++) {
      activateAllLights(300, 100);
    }
    activateAllLights(4000, 5000);
    loopCount = 0;
  }

  for (int x = 0; x < letterCount; x++) {
    letter = wordLetters[x];

    // X, Y, Z are used as indicators of changing the on and off time
    if (letter == 'X') {
      offTime = offTimeX;
      onTime = onTimeX;
    } else if (letter == 'Y') {
      offTime = offTimeY;
      onTime = onTimeY;
    } else if (letter == 'Z') {
      offTime = offTimeZ;
      onTime = onTimeZ;
    } else {
      int letterCode = getLetterCode(letter);

      if (letterCode == 0) {
        delay(onTime + offTime);
      } else {
        activateLight(letterCode, onTime, offTime);
      }
    }
  }
  loopCount++;
  delay(waitBetweenLoops);
}