Looping regions not working

[x6270]

Hi, i have this script:

every 10 seconds:
    broadcast "1"
    loop {zombies::*}:
        broadcast "2"
        loop all blocks in the region {zombies::%loop-value%}:
            broadcast "3"
            spawn zombie at loop-block
            set name of last spawned entity to "Boss"

And I'm trying to spawn a zombie in all the blocks of the looped region of {zombies::*}, but it isn't working, i was trying to use the "broadcast "number"" to see where it fails and every 10 seconds it broadcast "122" and any 3.
Any ideas?
Thanks
PD: Also I tried to define 1 region with just the variable (not the variable list) and it isn't working.

 

[ShaneBee]

Try that:

every 10 seconds:
    broadcast "1"
    loop {zombies::*}:
        broadcast "2"
        set {_region} to loop-value parsed as text #(or region if don't work)
        loop all blocks in the region {_region}:
            broadcast "3"
            spawn zombie at loop-block
            set name of last spawned entity to "Boss"

or using this line if don't work:

loop all blocks in the region "%{_region}%":