Can soneone tell me the error in this in the context one?

Question

var canvas = document.createElement("canvas")
document.body.appendChild(canvas)
/*canvas.width = 300px
canvas.height = 300px*/
var context = canvas.getContext('2d')
context.fillStyle = 'green'
context.fillRect(0, 0, 10, 10)
var x = 0
window.requestAnimationFrame(function loop() {
x += 1
context.fillStyle = 'red'
context.fillRect(0, 0, 100, 100)
})
/*var c =document.getElementById("mycanvas");
var ctx = c.getContext("2d");
ctx.fillText("Start", 0 , 10);*/
/*
context.font ='25px Arial';
context.fillStyle ='black';
context.fillText("Start Game",100,200);*/

Answer 1

You can link your code like this:
Click +, Insert Code, sort for My Code Bits, select your code.
This way it is more readable and people can test your code.

Answer 2

What error are you talking about?

Answer 3

https://code.sololearn.com/WT8WwZKjZiL4/?ref=app