Macro QuestionFollow

i am trying to get a couple macros to work and i'm having problems.
this is my first real attempt at macros and i'm going off of a template a friend gave me from work.

anyway, i want my character to be able to kill mobs in the general vacinity and harvest, with an infinate loop.

first i just want to make sure i'm numbering the toolbars appropriately.

starting at the top, there is 3 sections of 4 boxes.
does it start at 0 or 1?
what if i have the row pulled down so that there is 2 rows across, what's the numbering scheme then?

here's the macros i have set up:

in slot 21:
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/ui action toolbarSlot22;
/pause 30;
/harvest meat;
/ui action toolbarSlot21
---------------------------------

in slot 22:
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/ui action targetSelf;
/ui action cycleTargetOutward;
/ui action toolbarSlot16;
/attack
---------------------------------
* slot16 = pistol

please correct me if i am incorrect.
i know these are case-sensitive and i typed them here exactly as they are in the scripts.
i've tried changing the numbers until my head hurts and it doesn't do anything, except just give me the message "you cannot extract resources from %TT in your current state".

thanks for anyhelp.