The 3Dots are because Predator uses a 3 Dot laser targeting system, I assume the one you are talking about that you can't see any of is because it inverts the colors of pixels (If the screen is say white the cursor is black, screen is blue the cursor is orange, etc...) The ones with the lines that go away are based off of the Predators number system so it's like a timer countdown. The triangles are because in Predators vision modes he sees a triangle that shows him like movement that he is targeting. The color is red because that's the colors in the movies / games. Now that you know that is it a little less 'random'?