How do I remove the button and text?

Question

I’ve been trying for a while and haven’t made any progress.
https://code.sololearn.com/W0986fAofqwA/?ref=app

Answer 1

All the menu is in a div with id "menu", to hide this use:
document.getElementById ("menu").style.display = "none";
And to show this replace "none" to "box".

https://code.sololearn.com/WS315Q1TDrm0/?ref=app

Answer 2

First of all either remove onclick attribute from <button> tag or declare Start() function

Now there are two ways to remove button and text:
function myFunction()
{
//To remove permanently
document.getElementById("button").remove();
document.getElementById("Title").remove();
}

function myFunction()
{
//to hide
document.getElementById("button").style.display="none";
document.getElementById("Title").style.display="none";
}