Randomize background color

Hey everyone! Hope your guys are doing good. I have a quick question for anyone that can help! Basically I’m looking to have my background color constantly change between 4 or 5 colors randomly or in a loop. I’ll take either option at this point! I can’t find any information on how to do this. I believe it’s easy but Unfortunately im not super familiar with CSS code.

If anyone can walk me through the steps to achieve this, I would be forever grateful!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)