I'll answer here too in case folks have a similar question :)
No need to claim the squares - just write your stories and post that you filled them (Example: FILL: Yellow Squares), along with links, here so I can add to the Master Post as well as arrange for your prize.
Re: Filled - yellow
No need to claim the squares - just write your stories and post that you filled them (Example: FILL: Yellow Squares), along with links, here so I can add to the Master Post as well as arrange for your prize.