function CircleConstructor(x,y,radius) {

  this.x = x;

  this.y = y;

  this.radius = radius;

  this.paint = function() {

    circle(this.x,this.y,2*this.radius);

  }

}

​

class CircleClass {

  constructor(x,y,radius) {

    this.x = x;

    this.y = y;

    this.radius = radius;

  }

  paint() {

    circle(this.x,this.y,2*this.radius);

  }

}

​

let c1 = new CircleConstructor(300,100,30);

let c2 = new CircleClass(100,100,50);

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  c1.paint();

  c2.paint();

​

}