Let’s talk about one of the basic photography techniques, called as Light Painting or Writing with Light Photography using Long Exposures. You might have seen some texts written in an image using a flashlight or a torch or even a cell phone screen. This is what we will be doing today.
What you need for this is a tripod, a camera that allows you to change shutter speed, and a flashlight preferably not too bright. Best time to click this photo is when its dark that is in the night time or if you can manage a dark room. So think about a pattern of what you want to click and lets get started.
Check out this video that I have created for your better understanding.
You can use this tutorial to not only write something in air but to also paint out an object skeleton, just be creative.