lets begin with rectangles.
after the lesson you will get a challenge on khan academy.
then go back to this tab.
a computer is like a dog.
you tell it what to do, and it does it.
if your dog was a computer, you would tell it to sit by saying sit();.
but you can't do that in reality.
a semicolon is like a period in JS.
so that's why you saw the semicolon at the end of sit();
The end.
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