Filling space below horizontal scrolling

Good day,
I have a horizontal scroll. Because it needs as much pixels tall as it is wide is it okay to fill the blank space below the horizontal scroll with content? Or how do I close the gap?


Here is my site Read-Only:
https://preview.webflow.com/preview/hippyx?utm_medium=preview_link&utm_source=designer&utm_content=hippyx&preview=17ce9d8f1b7f5c8e1b2bf6db0dde5478&mode=preview