// .     Maybe one of Shiffmans?

// simple movement

​

let locn;

let velocity;

let gravity;

let maxspeed = 10;

​

function setup() {

  createCanvas(400, 400);

  locn = createVector(250, 250);

  velocity = createVector(5, -5);

  gravity = createVector(0, 0.5);

  textFont("monospace");

  fill(255);

}

​

function draw() {

    background(120);

  // the mouse loc in a vector

  let target = createVector(mouseX, mouseY);

  // make a vector between target and locaiton - pointing at target - swap to point away

  let steer = p5.Vector.sub(target, locn); 

  steer.setMag(1); // set length - magniutude - of vector to 1. retains direction

  velocity.add(steer); // add steering to velocity

  velocity.limit(maxspeed); // set max velocity

  locn.add(velocity);

​

  ellipse(locn.x, locn.y, 10, 10);

  checkBounds();

}

​

function checkBounds() {

  if ((locn.x > width) || (locn.x < 0)) {

    velocity.x = velocity.x * -1;

  }

  if ((locn.y > height) || (locn.y < 0)) {

    velocity.y = velocity.y * -1;

  }

}