0:00:04.880,0:00:07.720
This is the song writing lesson. The written

0:00:08.060,0:00:10.060
Music is
a lot like a computer program.

0:00:10.780,0:00:14.520
The written notes and words tell the singer exactly what
to do.

0:00:14.760,0:00:19.720
Some parts of music are used over and over again. We call this the chorus.

0:00:21.040,0:00:27.000
In a computer program, the parts of the program used over and over again are called functions.

0:00:28.360,0:00:34.120
When you read song lyrics, and it says the word "chorus", do you sing the word chorus?

0:00:34.620,0:00:39.320
No, you look at the top of the page to see what words make up the chorus.

0:00:39.960,0:00:45.300
In this lesson, you'll learn a silly little song called Little Bunny Foo Foo.

0:00:46.400,0:00:50.480
The song has a chorus
that you will sing several times over and over again.

0:00:51.440,0:00:55.580
A function is a piece of code
that you can call and use over and over again.

0:00:56.240,0:00:58.475
It makes programming easier and more efficient,

0:00:58.920,0:01:02.060
so you don't have to write out the steps of your function over and over again.

0:01:02.540,0:01:05.360
You can just write it once!