Lesson one: bleach loses its strength over time. I started with one bottle and NOTHING happened. I then found a second bottle in another closet and only got a ghost of a pattern. This is the one in the upper left side and bottom right side. I went to the store and bought a new small bottle of bleach. Once again, i used cut up cardboard. On the one, bottom row, second from the right and top row far left, I used the end of a gift wrap tube cut. it curled in and created a great pattern.