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                <div id='animation'></div>



                body { margin : 0px }


                const s = sketch => {

    //sketch wide variables can be put here.  useful
    //in the draw function where you may be incrementing
    //or using some fancy trigonometry
    let verticalPosition = 0;

    //preload things like images and fonts you want in your canvas
    sketch.preload = function() {


    //create your canvas and set things that you don't want changed
    sketch.setup = function() {

        //draw the canvas as big as possible
        var canvas = sketch.createCanvas(window.innerWidth, window.innerHeight);

        //drop it in a div with id = animation


    //loop and draw stuff X times a second
    sketch.draw = function() {


        //draw a line using two points in space
        sketch.line(0, verticalPosition, sketch.width, verticalPosition);

        //modify the height during each draw iteration
        verticalPosition = verticalPosition - 0.5;
        if (verticalPosition < 0) {
            verticalPosition = sketch.height;



//create an instance of P5
let p5js = new p5(s);