let mDiam = 40;

​

let x = [];

let y = [];

​

function ellipseOverlap(x0, y0, diam0, x1, y1, diam1) {

  let d = sqrt((x1 - x0) ** 2 + (y1 - y0) ** 2);

  return d < diam0 / 2 + diam1 / 2;

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  for (let i = 0; i < 8; i++) {

    let mx = random(width);

    let my = random(height);

    x.push(mx);

    y.push(my);

  }

}

​

function draw() {

  background(220, 10, 120);

​

  for (let i = 0; i < x.length; i++) {

    let mOverlap = ellipseOverlap(mouseX, mouseY, mDiam, x[i], y[i], oDiam);

​

    if (mOverlap) {

      fill(255, 190, 90);

    } else {

      fill(255);

    }

    ellipse(x[i], y[i], oDiam);

  }

​

  fill(255);

  ellipse(mouseX, mouseY, mDiam);

}

​