Hopper and E.T.

Take a look to the far right. What do you see? My grandson pointed this out to me. Remember the grasshoppers? This is from the movie "Bugs Life." This rock art formation looks just like one of the grasshoppers from that movie. There are other images in this photo that I am sure are not natural but I can't pinpoint anything in particular that they resemble. Actually the one in the shadow of the very tall rock does look like E.T. in his Halloween costume. How did they make these rock art formations anciently to resemble objects today?