Please watch the YouTube videos I made, they will answer a lot of your questions.
http://www.youtube.com/mecabricks

If you can't see the colors immediately, make sure your zoom is set to 100%! 😃

Thanks But I don't know where the patlete is.

I only want to change the colour for one brick but it keeps changing all of the bricks to that colour. How do I only change one brick's colour?

nevermind, sorry!