let F=10;

​

function setup() {

  createCanvas(400, 400);

  quad1 = new MyQuad;

}

​

function draw() {

  background(220);

  quad1.show(200,100,230,240,300,80,200,40);

}

class MyQuad {

  constructor(x1,y1,x2,y2,x3,y3,x4,y4) {

    this.x1 = x1+F;

    this.y1 = y1+F;

    this.x2 = x2+F;

    this.y2 = y2+F;

    this.x3 = x3+F;

    this.y3 = y3+F;

    this.x4 = x4+F;

    this.y4 = y4+F;

  }

  show() {

    quad(this.x1, this.y1, this.x2, this.y2, this.x3, this.y3, this.x4, this.y4);

  }

}