Thanks for replying, actually googled up a handier technique if you’d like to hear: put a rope origin (cube1 for instance), make a rope spline, constrait to cube1, get lamp (+rigid body tag on it), constraint to lamp on other side of the rope, get spring, object A: rope, B: lamp and if you set off lamp from a certain position it actually gives that endless swinging loop, maybe not that endless but enough for its screentime in my case. HOWEVER! The rope doesn’t catch up with lamp, wonder why is that since i put a constraint on it?! .c4d and screenshot if you like:

11294_hanging.c4d.zip