Ragging requires patience, an eye for detail and some rubber gloves!!!
Don't worry only our hands get messy.
The above ragging has the same base color that is on the top half of the wall with a maize yellow rag.
1st - choose and paint your base color.
2nd - choose your rag color
Usually you pick a darker color.
3rd - mix darker color with glaze
4th - using an artistic eye - start ragging.