Now, to visualize the back carbon atom, we simply draw this blue circle, which symbolizes this blue carbon here. And then, because these ch bonds are right across on the same plane of these ch bonds, we simply shift them slightly this way so that we can visualize it. Now, you should know these ch bonds in the back are actually aligned exactly with this ch bond. And the same goes for these two. But in order for us to visualize it, we shift the angle. We cheat a little bit.