Circle Remap Values

sketch.js

function setup() {
  createCanvas(windowWidth, windowHeight);
}

function draw() {
  background(255);
  var x = width/2;
  var y = height/2;
  var circleWidth = map(mouseX, 0, width, 0, 100);
  var circleHeight = map(mouseX, 0, width, 0, 100);
  fill(255,0,0);
  
  ellipse(x, y, circleWidth, circleHeight);
}