By no means is this some rule or anything. It's just something I learned from [link] and it helped me a lot with what I drew. Hopefully it is not confusing as I'm horrible at explaining things no matter how hard I try. T_T

Also, I am not sure if that is what this is called. When it was explained to me, he called it this so.. If somebody knows another name for it, I'm all ears.

NOTE: Ignore my cleanliness remark. I meant to put speed drawing. Dx