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Here's a function that draws a square with[br]50 pixel sides. That's great but what if I

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wanted to draw a square with sides 50 pixels[br]and another square with sides of 100 pixels?

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We shouldn't have to make two separate functions[br]that do almost the same thing. Instead, we

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can use one function with a parameter. Parameters[br]allow us to pass values into a function that

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get used as variables inside the function.[br]Let's try adding a parameter called like to

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this function so we can use it to create squares[br]of different sizes. In the function editor,

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you can edit the name and description like[br]before but now you can also add a parameter.

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Write the name of your parameter in the space[br]and click Add Parameter. This will create

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a red block with the name of the parameter[br]you just created. Now we can replace the move

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forward by 100 block with the parameter Length[br]so it will move forward by Length. Click save

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and close and drag out your new create a square[br]block from the functions category in the toolbox.

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You'll notice there's an empty space next[br]to length because the function wants to know

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what value the parameter Length should have.[br]Drag a number block from the Math category

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and place it in this space. See how you can[br]use the function again and again with different

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lengths to make squares of different sizes?[br]Try it for yourself!