Like Ghosts

FOR THOSE OF YOU WHO WANTED TO KNOW HOW I DID THIS :

The sun was almost down, but there was a little bit of light left (just before dark).
I just set my camer on AV mode, which is shutter speed priority, you choose the shutter speed, the camera chooses everything else. Of course you could set everything manually if you so choose.
I set my camera on the tripod & chose 30 seconds for the shutter speed.
I stood in each of these three positions for a few seconds, which is why there is a blur between the me's, from me walking.

That's it... This is all one exposure, no combining in Photoshop. :-)