Changing street lamps

A target may experience that a street lamp is switched on or off as he passes under it, walking or driving.

This may repeated intensively, maybe daily for several weeks.

For example, during 3 weeks a particular street lamp is switched off as you walk under it. In the next 3 weeks that street lamp is switched on as you walk under it.

 

© 2017 Cliff Huylebroeck Belgian flag