1. First squeeze the five colors of white, blue, light blue, emerald green and black into a clean plane.
2. Then find a ruler to flatten the pigment and brush it down, as shown below.
3, as shown in the figure below, brush up and down first, so that the color spreads evenly on the whole plane, showing excellent differences.
4. Then brush at will, so that the colors are fully mixed until the colors are uniform.
5. Brush until the color shows the color shown below, but sometimes you can use a ruler to cut off the pigments of other colors.