This tutorial shows how I made a 'V' tie dye pattern using tulip brand one step dye for tie dying.
Then you wrap a rubber band around the shirt over the top of the pencil line. You can add as many rubberbands as you like for as many color breaks as you desire.
On this one I used many colors starting with a dab of black at the collar, then blue, more black, pink, fuschia, purple, black, blue, yellow, pink, fuschia, purple, & black. I left the bottom end of the shirt loose to let the colors bleed together more.