Lighting, Light Fixtures, Ceiling and Exhaust Fans - Attic Lights

I Have One Attic Light Hooked Up To One Switch One Power Source But I Don't Know Where It Comes From I Have One 20amp Circut Marked Garage Which It Probably It All Breakers Are 20amp I Would Like To Add Two More Lights Do I Hook The Second Light Right Into The First By Way Of Two Wires Just Connect The Blk To Blk And Wht To Wgt And Ground The Source Is #12/2 How Do I Connect The Third Light To The Second The Same Way Or Is This Wired Different I Want To Turn All Three Lights On From The Same Switch These Are Single Bulb Porc. Lights

Turn off your caps. It makes it hard to read.
If you want more light to be controlled by the same switch then just connect the new lights color for color to the existing light.

joed
does that mean each of the new lights has thier own seperate line to the first light or is there a way to splice them on one line going to the first light

You can go from light to light to light. Just match all the colors at each light.