Calc background change depending on text

Hello!

I’m using Libre office Calc to store my school grades more efficiently, but I would like to use a colour code. I now use some formulas to calculate my mean grades and stuff, but I was wondering whether or not it is possible to change the background colour of a cell depending on the number the formula outputs. If so, what is the easiest way of doing this?

Thanks for answering!

-XLgaming_inc

HELP: Applying Conditional Formatting

@JohnSUN thx