First, get the necessary materials - a white t-shirt, piece of patterned cloth to your liking, pins, a needle and thread.
Second, if you are using a piece of cloth, you should fold it in half (with the inside of the cloth facing out), sew it together along the bottom, and turn the tube right-side in. The 2 ends can be tucked in a sewn directly unto the shirt to close them.
Third, pin the cloth unto the shirt. I suggest that you find the middle of the cloth - then pin that part to the middle of the shirt. Then make pleats and work your way to each shoulder so you have an even design.
Fourth, you can hand stitch the cloth onto the shirt using a back stitch.
And you're finished, enjoy! Check out my site, www.sustainabilady.com .