0:00:00.000,0:00:05.339
one thing that computers are really good

0:00:02.100,0:00:06.720
at is repeating commands as a person you

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get really bored if you had to do the

0:00:06.720,0:00:11.250
same thing lots of times in a row but a

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computer can do the same thing millions

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or even billions of times and not get

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bored and be able to carry that out

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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

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sending them an email it might take me

0:00:21.960,0:00:25.529
more than a century to actually write

0:00:23.760,0:00:27.779
out all of those emails to everyone but

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with just a few lines of code i can have

0:00:27.779,0:00:32.040
a system send an email to everyone on

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facebook wishing them a happy birthday

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so that's what loops are and why they're

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valuable and something that computers

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can do very well in this example your

0:00:38.550,0:00:44.160
goal is going to be to move the bird now

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we're going to be able to use the repeat

0:00:44.160,0:00:48.870
block in order to be able to do this

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very easily you can either do this by

0:00:48.870,0:00:53.969
giving the computer and move forward

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command five times in order to advance

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the the bird one step each time to the

0:00:56.579,0:01:01.469
pig or you can just tell the computer to

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move forward once and then tell it to

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repeat that five times and it will do

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the same thing so in order to do this

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you drag your move forward command and

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then you put it inside the repeat block

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and you can click on it and tell it how

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many times you want to repeat the block

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to tell how many steps you wanted to

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take forward now one more thing is you

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can put as many commands as you want

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inside the repeat block so in this

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example your tongue it to move forward

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and turn left which will do five times

0:01:28.710,0:01:35.689
alright good job and have fun