How does one create a spiral type of image with a pen laser?..tia sal2

Greets All

How does one create a spiral type of image with a pen laser?

I can make a Spirograph image using the instructions below.
http://www.laserfx.com/Backstage.LaserFX.com/Hobby/BasicShow.html

But I would Like to make a simple Spiral like in the link below
http://www.gwydir.demon.co.uk/jo/maze/simple.htm

TIA

.

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- Re: How does one create a spiral type of image with a pen laser?..tia sal2
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