@@jongsik7527 in the video time line what did you speak looking at pictures behind? I anyway dont understand your language, but u explain well with pics and pencil scribble and little English.
@@Mrunalini_art Hi. I'm one of students from the class. Teacher Shin said as follows. When you need to apply the middle tone between dark and light grey, each half of the middle tone must be allocated to both dark and light grey in order to satisfy the rule of a third. I wish this helps your understanding.