let rectHeight;

let rectX, rectY;

​

function setup() {

  createCanvas(600, 400);

  rectWidth = width/4;

  rectHeight = height/4;

  rectX = 0;

  rectY = height/2;

}

​

function draw() {

  background(0);

  rectMode(CENTER);

  stroke(255, 0, 0)

  noFill()

  rect(rectX+105, rectY+95, rectWidth+50, rectHeight+100)

​

  }