I had already done this when I made this tutorial...obviously...but it's mostly in the folding technique more than anything else, and I could take pictures of that after I was finished.
Like I said, this is mostly in the folding technique. Fold the shorts vertically, like you're making a paper fan.
Once you're finished, take your string, and tie the shorts in three places, so that they stay folded during the process.
My bleach mixture was 2/3 bleach and 1/3 water. I used my gloves and dipped the shorts in, then removed them and let their color lighten until I thought it was bright enough.
After letting them sit until the colors are your liking, dunk them into your bucket of water.
Lay flat to dry, or hang on clothesline.