WEBVTT

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One thing that computers are really good
at is repeating commands.

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As a person, you'd get really bored if you
had to do the same thing lots of times in a row.

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But a computer can do the same thing
millions or even billions of times,

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and not get bored and be able to carry
that out really well.

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So for example if I wanted to wish

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everyone on Facebook a happy birthday by
sending them an email,

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it might take me more than a century to
actually write out all of those emails to everyone.

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But with just a few lines of code, I can have
a system

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send an email to everyone on Facebook
wishing them a happy birthday.

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So that's what loops are, and why they're
valuable,

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and something that computers can do very well.

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In this example your goal is going to be
to move the bird

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to get the pig. Now we're gonna be able to use the "repeat" block

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in order to be able to do this very
easily. You can either do this by

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giving the computer a "move forward"
command

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five times in order to advance the bird
one step each time to the pig.

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Or you can just tell the computer to
"move forward" once,

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and then tell it to "repeat" that 5
times, and it will do the same thing.

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So in order to do this you drag your
"move forward" command,

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and then you put it inside the
"repeat" block.

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And you can click on it and tell it how
many times you want to repeat the block

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to tell it how many steps you want it to
take forward. Now one more thing is

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you can put as many commands as you
want inside the "repeat" block.

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So in this example you're telling it to
move forward and turn left,

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which it will do five times. Alright good
job and have fun :-)

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