vor die While-Schleife:
you = ent_create() sprite...
my.skill12 = handle(you);
in die While-Schleife:

you = ptr_for_handle(my.skill12);
vec_for_vertex(you.x,....);
...



Oder, du machst es über Partikel.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt