Is it possible to make an embed program?

Is it possible to make an embed program, and be able to set the width and height, and have the page adjust? I'm trying to implement it so that it's just taking 500 pixels, but I've got no progress so far. Here's my line of code.

<script src="https://www.khanacademy.org/computer-programming/new-webpage/5869824544555008/embed.js?editor=yes&buttons=yes&author=yes&embed=yes"></script>

It's not much, but that's what I'm pretty sure it should do. The ?width and ?height won't do anything, because they're just there for the canvas width and height, not the embed with and height.

So, again. Is it possible to change the width and height of the embed program? Iframe doesn't work on Khan Academy, so I'm pretty sure this is also the only method.

Thanks in advance!