How to paint Diamonds on the Wall

I just felt like this wall was missing something.  So I painted diamonds using leftover gray paint from the lighter two walls.  I love how it turned out!  It was a little trickier to do than I had expected. 

(More after the jump...)

I ended up making a diamond shaped template out of contact paper.  I drew horizontal rows in light pencil to make sure I stayed on track.  I moved the template around and marked the diamonds with blue tape.  BTW, I bought my blue tape at the Dollar Store and my lines still came out great.

I trimmed the torn edges of the tape at the diamond corners with an exacto knife (using a light touch).

To avoid absent mindedly painting the wrong diamonds I marked them off with a bit of tape and then got to work with my paintbrush.