This is very basic. You have to have a web cam and a printer. If so, print this pdf first.
Second, hold it in front of your web cam. Be sure you're in a well lit room, and when you see your printout in the video feed above, you should also see something else to play with.

To see my second example using multiple markers, click here.

If interested in how this works,or for better examples of this see my blog.

   limitedwave.blog

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