Photography smoke effect

How to create this smoke effect using a fast-turning strap on a media base ..
The equipment needed to get the results of photographs like this is, as follows:
Black background.
Tripot.
External flash or camera flash.
White strap.
cup.
LED flashlight.
And placemat for cup.
The way is ..
First camera settings should be set as dark as possible .. ISO 100 f / 16 1/250 second use manual settings
Remember the room must be dark once ..

Then sit your camera on tripot .. align with the cup object, put the black background on the back side of the cup ..
Put the string used as a "smoke-forming medium" .. blame the flashlight then point the flashlight to the cup from the top of the cup, then the rope is taken the tip while the other end in the cup .. and the tip you hold in the paste on the flashlight, then turn the flashlight in Fast ..
Remember to use the time settings on your camera ..
Actually this way is very easy only explanation is complicated, hehehee ..
If you are already in the field and try it you will find it easy and want to start another idea ..
Hope this way can be the inspiration of you all steemit friends ..
good luck.