Hi.
use an Array, set size to 10 so you can drop in the objects.
drop in all the objects in element 0 place the 1st one that should be activated and in element 9 the last on (and rest in between)
You can loop by using 'array get next'.
Or you could use an int starting @ 0 and on hit get array (use the int on the index)
enable the object and do int add 1 to the int value.
or an action called Iterate.
here's a video about arrays :