## Friday, November 30, 2012

### How to Download Scratch

It's easy to download Scratch, at no cost, from its home site at the Massachusetts Institute of Technology. Just click on the following video for instructions.

Posted by
grandadscience
at
2:16 PM
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## Thursday, November 29, 2012

### Welcome!

The purpose of this blog is to provide detailed
information about the mathematics, science, and programming techniques embedded
in the

*Scratch*programming projects I so love doing.
I was motivated to start this blog by a comment one
viewer made in regard to a project I posted on my

*Scratch*page at http://scratch.mit.edu/users/popswilson.
Here is a screen shot of the project. The

*squareflake*has the unusual property of always maintaining the same*as its originating square (in yellow) even if the***area****is increased indefinitely by repeatedly applying the Lindenmayer rule!***perimeter*
The aforementioned

*Scratch*user had viewed my*Lindenmayer System Squareflake*project at
(http://scratch.mit.edu/projects/popswilson/2909658)

and posted this comment,
AWESOME! How does it work?

How code works is always a good question. I did include numerous comments in the Scratch
scripts included in the project but they would most likely be helpful only to those that
already knew something about Lindenmayer systems.

Lindenmayer systems are not difficult to understand. In fact, I did the project because I did not understand a Lindenmayer system!

For those with an interest in learning the mathematics behind the code, I’ve written a detailed description of what Lindenmayer systems are, how they work, the applied mathematics, and how to program such systems in

For those with an interest in learning the mathematics behind the code, I’ve written a detailed description of what Lindenmayer systems are, how they work, the applied mathematics, and how to program such systems in

*Scratch*.
To obtain a free pdf file for the Lindenmayer project simply email a request to grandadscience@gmail.com and ask for

*Lindenmayer Systems in Scratch.*
Registered Scratch users can download the project by clicking on the above link. To download Scratch for the PC and Mac and become a registered user go to http://scratch.mit.edu/.

Posted by
grandadscience
at
4:07 PM
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Koch,
Koch snowflake,
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L-systems,
Lindenmayer systems,
Scratch,
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