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I'm Lydia Winters, Mojang's brand director and we made a little game called Minecraft.

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My favorite thing to do in Minecraft is explore. I love adventuring in caves and seeing what

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I can find. As someone who isn't a programmer, I'm really excited to go through the Minecraft

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lessons and actually learn some coding myself.

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The last level needed lots of \"move forward\" blocks. It would be easier if we could just tell the computer to perform the move forward

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command four or five times. Luckily for us, computers are really good at repeating commands

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with repeat loops. When building Minecraft, we use repeat loops to place all the initial

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materials for creating a new world. That's thousands and thousands of blocks. We also

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use loops in little ways, for example to make Alex's feet move back and forth as she walks.

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Repeat loops are a powerful part of programming.

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Night is coming so in the next couple of levels, we're going to build a house to stay safe. We're going to use the repeat block to do

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this very easily. To build a wall of our house, we can either tell Alex to move forward and

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place planks four times or we can tell her to move forward and place one plank, then

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take this command and use the repeat block to have her perform the action multiple times.

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Now we'll click on the repeat block and tell her how many times we want her to perform

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this action. Now let's build our house before night falls! Have fun.