​

  constructor(s) {

    // Store a count for occurences in two different books

    this.countDracula = 0;

    this.countFranken = 0;

    // Also the total count

    this.totalCount = 0;

​

    this.position = createVector(random(width), random(-height, height * 2));

    // What is the String

    this.word = s;

  }

​

  // We will display a word if it appears at least 5 times

  // and only in one of the books

  qualify() {

    if ((this.countDracula == this.totalCount || this.countFranken == this.totalCount) && this.totalCount > 5) {

      return true;

    } else {

      return false;

    }

  }

​

  // Increment the count for Dracula

  incrementDracula() {

    this.countDracula++;

    this.totalCount++;

  }

​

​

  // Increment the count for Frankenstein

  incrementFranken() {

    this.countFranken++;

    this.totalCount++;

  }

​

  // The more often it appears, the faster it falls

  move() {

    let speed = map(this.totalCount, 5, 25, 0.1, 0.4);

    speed = constrain(speed, 0, 10);

    this.position.y += speed;

​

    if (this.position.y > height * 2) {

      this.position.y = -height;

    }

  }

​

​

  // Depending on which book it gets a color

  display() {

    if (this.countDracula > 0) {

      fill(255);

    } else if (this.countFranken > 0) {

      fill(0);

    }

    // Its size is also tied to number of occurences

    let fs = map(this.totalCount, 5, 25, 2, 24);

    fs = constrain(fs, 2, 48);

    textSize(fs);

    textAlign(CENTER);

    text(this.word, this.position.x, this.position.y);

  }

}