constructor(x, y) {

    this.location = createVector(x, y);

    this.velocity = createVector(5, -5);

    this.maxspeed = 10;

  }

  move() {

    // the mouse loc in a vector

    let target = createVector(mouseX, mouseY);

    // make a vector between target and locaiton - pointing at target - swap to point away

    let steer = p5.Vector.sub(target, this.location); 

    steer.setMag(1); // set length - magniutude - of vector to 1. retains direction

    this.velocity.add(steer); // add steering to velocity

    this.velocity.limit(this.maxspeed); // set max velocity

    this.location.add(this.velocity);

  }

  display() {

    ellipse(this.location.x, this.location.y, 10, 10);

    this.checkBounds();

  }

  checkBounds() {

    if ((this.location.x > width) || (this.location.x < 0)) {

      this.velocity.x = this.velocity.x * -1;

    }

    if ((this.location.y > height) || (this.location.y < 0)) {

      this.velocity.y = this.velocity.y * -1;

    }

  }

}