Sure! For the song "Money (That's what I want)" and specifically for the B7 and A7 chords, a common strum pattern to use would be a simple down-up strum, accentuating the first beat of each measure. You can try something like:
Down (on the first beat) - Down-Up (on the second and third beats)
For a more advanced option, you could also try incorporating some palm muting or syncopation into your strumming to give it some extra groove. But as a beginner, sticking to a simple down-up pattern should work just fine. Practice it slowly at first, and gradually increase your speed as you get comfortable with the chords and rhythm.