Hello! in need of some trigger outlines

Hello! in need of some trigger outlines

Hi there. Heres the deal:

I would like to create a map where units spawn from a area and head downwards to attack the town hall. however im not very great with triggers so i was wondering if anyone had a already existing trigger set up for something like this that i could use please?

Thanks

It's quite simple

event:
time- period (whatever period)
conditions:
none
action
unit- create (how many units wanted) of type (unit type wanted) for player (owner of these units) facind default building degrees.
unit group- pick up all units in last created unit group and do action:
action:
order (picked unit) to (attack-move)to postion of unit (town hall)

Thanks matey