Add a "when I start as clone" block from the yellow "Events" section. This event will let you add code to only the newly created clones, and not to the original sprite.
You want the clone to start at the bottom of the screen, lined up with the corresponding arrow at the top of the screen. The starting Y position will be at the bottom of the screen, which is around -150. The starting X position will be the same as the corresponding arrow sprite at the top of the screen. (For example, the Left Arrow should start at X: -185, Y: -150)