@hiquerr@wenbow Thank you Hiquerr and Wendy. We used a small flashlight. I had the camera exposure to last for 10 seconds and my husband stood out in the yard facing the camera and moved the flashlight around in the shape of a car in the air. I didn't even know what he was drawing until I saw it in the display on the camera. I've never tried the actual light part myself.
How amazing. Just read your note above. I never heard of this process before. I can't even imagine how mine would turn out---probably a jumbled mess. Your hubby is very creative!