This video is an example of my questions on this thread at the Adafruit forum.
I figured it out. The red square thing beeps when you touch the sticks to the little light thing. You thought I was not paying attention.
chuck
I LOL’d at the thought of me explaining a tool to you, Chuck.
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Wylbur's Inner Geek 
I figured it out. The red square thing beeps when you touch the sticks to the little light thing. You thought I was not paying attention.
chuck
I LOL’d at the thought of me explaining a tool to you, Chuck.