"Rice" is originally an acronym for "Race Inspired Cosmetic Enhancements(race as in racecar driver, not as in ethnicity)", which was then barrowed to the Linux community to mean "Custom Theme", which was then borrowed to this website, on this screen that you're looking at right now.
(but that doesn't matter because holy yappington "i came here for monkeytype theme not a yappichino!111!"
(sorry, am sleep deprived writing this at 00:45, just scroll down for actual stuff)
The Actual Stuff
Potato Theme:
Click on the button below to obtain the configuration I have created for the Potato theme. (More instructions are under the button if you're blind.)
Then, Go on monkeytype.com.
Click on the "settings" button, which is a cogwheel next to the letter "i", next to a crown next to a keyboard, which is in turn next to the monkeytype logo on the top left.
Click on the "danger zone" text, next to the "hide elements" text.
Click on "import" under the heading "import/export settings".
Paste the stuff from the clipboard, then click "import settings".
Then, the theme will be applied, and you can return to typing.
https://monkeytype.com?customTheme=eyJjIjpbIiMzMjM0MzciLCIjNjdiMGU4IiwiI2QxZDBjNSIsIiNiM2I5YjgiLCIjMmMyZTMxIiwiI2RhZGFkYSIsIiNlNTc0NzQiLCIjZTU3NDc0IiwiI2U1NzQ3NCIsIiNlNTc0NzQiXX0=