// Daniel Shiffman

// http://natureofcode.com

​

// Example 1-1: Bouncing Ball, no vectors

//velocity and vectors one effects the another and acceleration all are connected

// let x = 100;

// let y = 100;

// let xspeed = 2.5;

// let yspeed = 2;

​

​

function setup() {

  createCanvas(640, 360);

  background(51);

}

​

function draw() {

let positions =createVector(13,9);

let velocity= createVector(5,14);

​

  // Add the current speed to the position.

  // x = x + xspeed;

  // y = y + yspeed;

  positions.add(velocity);

​

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

    // xspeed = xspeed * -1;

   velocity.x= velocity.x*-1;

  }

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

  //   yspeed = yspeed * -1;

    velocity.y= velocity.y * -1;

  }

​

  // Display circle at x position

  stroke(0);

  strokeWeight(2);

  fill(127);

  ellipse(positions.x, positions.y, 48);

}