constructor(hue, s, b, rad) {

    this.r = rad;

    this.h = hue;

    this.a1 = 0;

    this.a2 = 0;

    this.c = color(hue, s, b-50);

    this.cc = color(hue, s, b);

    this.p = createVector(random(this.r/2, this.width-this.r/2), random(this.r/2, this.height-this.r/2));

    this.e = createVector(random(this.r/2, this.width-this.r/2), random(this.r/2, this.height-this.r/2));

    this.di = createVector();

    this.s = 0;

    this.d = this.p.dist(this.e);

    this.sW = random(1, 4);

  }

  update() {

    this.s = 5-3*cos(map(this.p.dist(this.e), this.d, 0, 0, 360));

    this.a1 = map(this.s, 2, 22, 0, 100);

    this.a2 = map(this.s, 2, 22, 0, 5);

    this.di = this.e.copy().sub(this.p).limit(this.s);

    this.p.add(this.di);

    if(this.p.equals(this.e)) {

        this.e = createVector(random(this.r/2, width-this.r/2), random(this.r/2, height-this.r/2));

        this.s = 0;

        this.d = this.p.dist(this.e);

    }

  }

  show() {

    strokeWeight(this.sW);

    stroke(this.c);

    noStroke();

    fill(this.cc);

    ellipse(this.p.x, this.p.y, this.r);

  }

}