let obstacles = [];

let square;

​

function setup() {

  createCanvas(400, 400);

  target = createVector(random(width), random(height));

  for (let i = 0; i < 5; i++) {

    let obstacle = createVector(random(width), random(height));

    obstacles.push(obstacle);

  }

  square = createVector(width/2, height/2);

}

​

function draw() {

  background(220);

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

    let obstacle = obstacles[i];

    let distance = p5.Vector.sub(square, obstacle);

    let magnitude = 50/distance.mag();

    let direction = distance.normalize();

    let force = direction.mult(magnitude);

    square.add(force);

    fill(255, 0, 0);

    ellipse(obstacle.x, obstacle.y, 20);

  }

  let distance = p5.Vector.sub(target, square);

  let magnitude = 0.5 * distance.mag();

  let direction = distance.normalize();

  let force = direction.mult(magnitude);

  square.add(force);

  fill(0, 255, 0);

  ellipse(target.x, target.y, 20);

  fill(0, 0, 255);

  rect(square.x-10, square.y-10, 20, 20);

  target.x += random(-5, 5);

  target.y += random(-5, 5);

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

    obstacles[i].x += random(-5, 5);

    obstacles[i].y += random(-5, 5);

  }

}

​