The Reason that this photo is so significant is if you look at it large the O synced up perfectly. Free handing, Writing backwards in the dark takes a while to get the hang of. Using your body and knowing that its proportionate on either side.... Split your self right down the middle from the nose down. Start with that if you stay still you can move your right arm from your hip to your head and it will be like that on the other side aswell you can start to get symmetry its a good place to start. Then when you are drawing in the dark you can start to build muscle memory.