This is a simple photography. Even you can try this kind of photography during this lockdown. How did I do this? Simple.. You just need a plastic carry bag, a torch( I used my secondary phone's flash light).
Now here's what you need to do.
Put the torch (switched on) inside the white plastic bag. This acts like a softbox. Now light the keyboard using this way.
Open your camera from your Galaxy and go to pro mode. Play with the shutterspeed untill the background turns black. I achieved this at around 1/50sec, at ISO 50 and F2.4.
Now open the image from the gallery and edit it using Samsung's in app photo editor. I have put up a video below... I have further put my logo and painted black over the area covered with dust. This way you can achieve a great bnw photograph without any expensive equipment.