var speed = 1

var walk = 0

var jump = 200

function setup() {

  createCanvas(400, 400);

​

}

​

function draw() {

  background(220);

rect(walk,jump,30,30)

if (mouseIsPressed){

​

}

if (keyIsPressed){

yspeed = yspeed + 1

} 

​

  walk = walk + speed 

  jump = jump + yspeed

  if (walk > width) {

  speed = -1

  }

if (walk < 0) {

  speed = 1

  }

}