let x = 0;

let y=height/2;//？？？

let directionX = 2;

let directionY = -2;

​

function preload() {

  gif = createImg("lunidin.gif"); //??

}

​

function setup() {

  createCanvas(500, 500);

  background(220);

}

​

function draw() {

  gif.position(x, y);

  x = x + directionX;

  y = y + directionY;

​

​

}

​