Random color square JavaScript

Write a program that draws a random color square centered on the graphics canvas. The sides of the square should be SIDE_LENGTH.

(Hint: Use the Randomizer to get a random color for the square.)

// Create a canvas

const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');

// Set the size of the canvas
const SIDE_LENGTH = 100;
canvas.width = SIDE_LENGTH;
canvas.height = SIDE_LENGTH;

// Generate a random color
const randomColor = '#' + Math.floor(Math.random()*16777215).toString(16);

// Draw the square
ctx.fillStyle = randomColor;
ctx.fillRect(canvas.width/2 - SIDE_LENGTH/2, canvas.height/2 - SIDE_LENGTH/2, SIDE_LENGTH, SIDE_LENGTH);