I've fixed a bug in xss that would cause the included "magic" hack to die after running for a few days straight. My 4-year-old daughter asked me to explain it to her, and it's such a good explanation that you're going to get it too.
Every time I wanted to draw a new line, I would ask for a new color of crayon. Then there's this guy who you can tell "I'm done with this crayon" and will come pick it off of the floor. But I told the guy I was done with the crayon before I put it down on the floor, so when he came by to pick it up, he didn't see it and went away. Over time, I wound up taking every crayon in the box, and then the teacher noticed and gave me a timeout for not sharing crayons. Her first question: "how many crayons did you take, daddy?" My answer: "oh, probably a couple million." Download available at http://woozle.org/~neale/src/xss/ Neale
