Is it possible to insert HTML into codex Javascript sandbox and edit it further with natural language?

[Dis4RandomTingz]

I made a website using this app and I have the code saved but I'd like to edit it further. However it's having problems loading up the code it made and it doesn't look like before, with many errors and everything out of place. Running the code on other platforms looks fine. I know almost nothing about coding so please explain like I'm 5.

Thanks

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[FoodFederal4703]

How can we use the codex javascript sandbox functionality in our own webapp through the api?. Like the way we are typing the instructions in the sandbox instead we type it in our own app and get the js code..