constructor(x, y, r = 50) {

        this.x = x

        this.y = y

        this.r = r

        this.red = 255;

        this.green = 255;

        this.blue = 255;

    }

​

    changeColor(red, green, blue) {

        this.red = red;

        this.green = green;

        this.blue = blue;

    }

​

    overlaps(other) {

        let d = dist(this.x, this.y, other.x, other.y);

        return (d < this.r / 2 + other.r / 2);

    }

​

    move() {

        this.x += random(-1, 1);

        this.y += random(-1, 1);

    }

​

    position() {

        stroke(0);

        fill(this.red, this.green, this.blue, 100);

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

    }

}