Lua Universal Emmitables Tracker(LUET)[U3]

LUET allows you to track emitted objects (currently only coords).
Controls:
F - spawn wooden ball, it's x and y will be shown on graphers.
G - toogle tracking change(if it's on, lua will track last object when it was on).
For devs:
I was very surprised, when I made feedback feature, and was unable to loop one out of lua to one in of lua. Fix it please. Feedback was featured into script, because it allow to track only needed objects, not every. Now I using common laser-laser sensor feedback. I don't remove feedback feature, because I hope you'll fix looping issue. Thanks
[U3] made tracker return emmitables's ids as numfeed.

Comment, suggest. Ask for specified trackers, if ye need them and can't/don't want make edit script.