Soak and wring out fabric. Lay out shirt face down on a flat surface. Decide which way you want your stripes and face the fabric so that the stripes would be vertical. Hold down a lower corner and place a finger on the opposite side, a few inches in. Pull that finger down, then hold that point in place while doing the same with the opposite side. Keep alternating all the way up the shirt. Rubberband along the resulting tube-shaped fabric and dye each rubberbanded section in the order you want your stripes colored.