I can not, for the life of me, figure out how to add an effect value to a unit. I know how to create it, but...

Let give an example.

A Zealot has two separate effects for it's attack. One is the damage, and the second effect I presume is so that it attacks twice.

I'm trying to make a unit attack twice but don't know how to make it do that. Any suggestions? Also, if there were sort of an explanation on the "period effect" that would be helpful. I don't know why a Zealot's is .2800 and a Viking's is .2100

The first one is the most important, thank you for any help.

Let give an example.

A Zealot has two separate effects for it's attack. One is the damage, and the second effect I presume is so that it attacks twice.

I'm trying to make a unit attack twice but don't know how to make it do that. Any suggestions? Also, if there were sort of an explanation on the "period effect" that would be helpful. I don't know why a Zealot's is .2800 and a Viking's is .2100

The first one is the most important, thank you for any help.