How to draw the effect of point, line and surface?

Taking the above picture as an example,

Lines of points, lines and surfaces cannot be separated from points and surfaces.

Lines, plus dots, are dotted lines,

Lines, plus black, white and gray, are the differences in colors.

Line, plus large, medium and small, is the weight of force.

Line up your lines, which is what we often say.

When it comes to lines, we can also understand the surface and layering.

In Chinese painting, there are all kinds of strokes.

Sketch, sketch, draft and so on use different lines.

Remember, dot, line, surface, black, white, gray, large, medium and small, with distinct levels, even if you get started!

Picasso's lifelong wish is to paint like a child. Therefore, lines are his tools to express art, just like the "dove of peace" he painted for the United Nations, and they are a model of simplicity and simplification of lines.