This may not look simple but it was a really quick card to make. The 9 blocks of patterned paper is really one piece of paper - I downloaded this patterned paper from PaperTrey and it was already in blocks. I trimmed one piece to just 9 blocks and adhered it to my card base. I stamped the smaller square using a stamp from PaperTrey's Gridlines stamp set and embellished with a brad and some Amuse Twinkler Micro Dots.
Supplies: Stamps - PaperTrey Gridlines; Paper - PaperTrey; Misc. - Amuse Twinkler Micro Dots, Brad, pop dots