Alan Zenreich
So here's the scoop.

I am using software on my iPad called Photo Soft Box Pro HD. It's generally used to configure an iPad as a photographic light source (by displaying various images or patterns, e.g., a divided window). I think it costs a massive $2.99

I decided to use it as a background, and display a bright spot under the pen. The software lets you change all the parameters of the underlying image... size, position, rotation, color, brightness, etc.

One cool thing is that there is a companion app for the iPhone (Photo Soft Box Pro Remote, another $0.99)... and via bluetooth, the iPhone controls the iPad app, so I could change color, intensity, etc without touching the iPad screen.

Cool, eh?

The iPad was placed in a photo tent. There was one fluorescent light shining through the left side of the tent. A white reflector on the right, next to the iPad. A black board was angled above the iPad so the screen reflected the black card.

The reason the color of the pen is not quite right in my first attempt was that I was experimenting with the color temperature of the spot displayed on the iPad. I needed to make it cooler so I could up the red in the pen without the spot going red.

So, this setup is really only suitable to small items, but it suits my style (I like using reflective backgrounds anyway).

What do you think?