Facing problem related to custom code

I am currently pursuing my bachelors in Interaction design, without much coding literacy. As I am making my final year portfolio I have selected and applied a background animated with custom code feature in webflow that I wanted to but I am unable to add anything like nav bar / scroll page on it.

custom code link`


Here is my site Read-Only: [https://preview.webflow.com/preview/sujals-trendy-site-8f165d?utm_medium=preview_link&utm_source=dashboard&utm_content=sujals-trendy-site-8f165d&preview=217ad1db2ecb6d6dea1e501835cddfa2&workflow=preview](https://preview.webflow.com/preview/sujals-trendy-site-8f165d?utm_medium=preview_link&utm_source=dashboard&utm_content=sujals-trendy-site-8f165d&preview=217ad1db2ecb6d6dea1e501835cddfa2&workflow=preview)

published website



(https://sujals-trendy-site-8f165d.webflow.io)

@cyberdave