Anyone know how to build a greasemonkey script?

[eosrose]

I typically download fic and forget to come back to kudos/comment later. Anyone know how to make a script that will highlight fic that I've already left a kudos and/or comment on? It'll make checking to see if I've left feedback so much easier. XD

Edit: I'm looking for and indicator from the tags/search results pages. I don't want to go to the specific work page to check.