Step 1: Stencils
First, with some poster board, trace a few designs. We picked crosses.
Carefully cut out the shapes.
Step 2: Dye
Using a plain white T, you can make your own color by using some rit dye and boiling water.
Step 3: Spray Paint (Part 1)
On one side of the shirt, use the left over poster board as a stencil and spray paint lightly to prevent the paint from bleeding.
Step 4: Spray Paint (Part 2)
On the other side, use the cut outs and spray paint.
Step 5: Personalize
Give your shirt a personalized look by cutting or poking holes, dying, and/or adding some cool stitching.