JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="dialStage" width="800" height="600">
</canvas>

JavaScript

var canvas = document.getElementById("dialStage");
var stage = new createjs.Stage(canvas);

createjs.Ticker.addEventListener("tick", stage);
createjs.Ticker.addEventListener("tick", tick);

var nPressed = true;
var ePressed = false;
var sPressed = false;
var wPressed = false;

var line = new createjs.Shape();
stage.addChild(line);

var startX = 400;
var startY = 300;
var color = 0xFFFFFF;
function tick(){
    if(nPressed)
    {
        line.graphics.setStrokeStyle(3);
        line.graphics.beginStroke(color);
        line.graphics.moveTo(startX, startY);
        startY--;
        line.graphics.lineTo(startX, startY);
        line.graphics.endStroke();
    }
    
    if(ePressed)
    {
        line.graphics.setStrokeStyle(3);
        line.graphics.beginStroke(color);
        line.graphics.moveTo(startX, startY);
        startX++;
        line.graphics.lineTo(startX, startY);
        line.graphics.endStroke();
    }
    
    if(wPressed)
    {
        line.graphics.setStrokeStyle(3);
        line.graphics.beginStroke(color);
        line.graphics.moveTo(startX, startY);
        startX--;
        line.graphics.lineTo(startX, startY);
        line.graphics.endStroke();
    }
    
    if(sPressed)
    {
        line.graphics.setStrokeStyle(3);
        line.graphics.beginStroke(color);
        line.graphics.moveTo(startX, startY);
        startY++;
        line.graphics.lineTo(startX, startY);
        line.graphics.endStroke();
    }
}

window.onkeydown = function(e){
    color = createjs.Graphics.getRGB(0xFFFFFF * Math.random(), 1);
    switch(e.which){
        case 38:
            wPressed = false;
            ePressed = false;
            sPressed = false;
            nPressed = true;
            break;
        case 39:
            nPressed = false;
            sPressed = false;
            wPressed = false;
            ePressed = true;
            break;
        case 40:
            wPressed = false;
            ePressed = false;
            nPressed = false;
     ...