They're on the same plane. So if we look this way on our molecule, so here is our molecule and we're looking this way, we're going to see that this carbon bond, this carbon H bond exactly aligns with this carbon H bond. And likewise this carbon H bond aligns with this and this carbon H bond aligns with, aligns with this one. Now this is eclipse. What happens if we take the sigma bond and we rotate the sigma bond 180 degrees in this fashion? So we rotated 180 degrees.