In this Instructable we will go over a quick method for recreating such a grid and see some variations as well.
Step 1: Starting the grid
Start by making your basic building block: a black square with two identical smaller blue squares attached to the right side and bottom. The blue squares will determine the distance between the black squares.
Step 2: First copy
Step 3: Keep copying
Step 4: Second verse...
Grab the whole row, copy it, and shift it down. Keep doing this until you have the grid you see below.