class Circle

{

  constructor(x, y)

  {

    this.x = x;

    this.y = y;

  }

}

​

​

function setup()

{

  createCanvas(400, 400);

  // Here is a hypothetical class that you wouldn't

  // want to use that IS defined inside a function

  class ExampleClass

  {

    constructor(x, y, whatever)

    {

      this.x = x;

      this.y = y;

      this.whatever = whatever;

    }

  }

  // You can only create instances of ExampleClass

  // inside the setup function

  let example = new ExampleClass(1, 2, 3);

}

​

​

function draw()

{

  background(220);

  // You cannot create an instance of ExampleClass

  // here, because this is a different scope from

  // where the class was defined

  let thisWontWork = new ExampleClass(4, 5, 6);

}

​