let centerX, centerY;

let xSpeed = 2;

let ySpeed = 2;

​

function setup() {

  createCanvas(180, 400);

  a = 0.25 * width;

  b = 0.25 * height;

  c = 0.75 * width;

  d = 0.75 * height;

​

  //Initial center

  centerX = (a + c) / 2;

  centerY = (b + d) / 2;

}

​

function draw() {

  background(220);

​

  if (centerX < mouseX) {

    centerX += xSpeed;

  } else if (centerX > mouseX) {

    centerX -= xSpeed;

  }

  if (centerY < mouseY) {

    centerY += ySpeed;

  } else if (centerY > mouseY) {

    centerY -= ySpeed;

  }

​

  // Update rectangle coordinates based on the new center

  a = centerX - (c - a) / 2;

  b = centerY - (d - b) / 2;

  c = centerX + (c - a) / 2;

  d = centerY + (d - b) / 2;

​

  // Draw the rectangle with updated coordinates

  line(a, b, c, b);

  line(c, b, c, d);

  line(c, d, a, d);

  line(a, d, a, b);

}

​