Continue pulling the shirt up, one dot at a time, while you add one more spoonful of dye at each new layer. To deepen the effect, you can let the layers soak a bit longer each time so that the darker layers absorb more dye. When you get to the bottom, grab the shirt by the top, and wring it out from the top down into the bucket. Now throw it in the washer by itself, and wash it on the cold cycle. Voila - you should have a new piece of clothing with a gorgeous gradient!
I have a few more tips on step seven of the tutorial in this blog post