Please check out, and rewatch it and try to understand how it works. Focus on the words Devin is saying. It is a useful tool, and can you can make it yourself. Have fun!! make sure to watch it to the end (or else there will be some problems.
I used the idea from khan academy, science section.And there is a lesson about this in there that I had watched to learn about it. I encourage people to try watching that to.
