Try putting your camera on its tripod, very low to the ground looking straight up, under a ceiling light. Pull curtains and close the door, tight. Shut out all extraneous light.
Get a mimi maglite (I use an AA one) and take the lens off to leave bare bulb, hang it off the ceiling light fitting on a piece of string.
Set camera on long exposure....3 secs, 4 secs, something like that - 10 secs if you like. Experiment.
Set lens to about 28mm and f8, focus on the bulb of the torch.
Turn out the lights. Trip shutter but leave lens cap on! Turn on the torch (might mean taking the lens off now and not earlier, it is a long time since I used one!)
Swing the torch on the string and let it swing round in circles - don't interfere and leave it swinging. It will go round and round in ever decreasing circles. Take off the lens cap as it is on the swing and leave it there while the bulb burns the trails onto your "film".
If you use straight coloured gels over the lens you can change the colour of the trails as the bulb is swinging. After first swing - check and adjust as necessary. You might want a longer lens setting and less/more aperture. All depends on your film speed and how bright your torch is.