How to draw Layers of soil diagram easily/Layers of soil diagram drawing

How to draw Layers of soil diagram easily/
Layers of soil diagram drawing
Easy way to draw layer of soil diagram step by step
In this video I used Artline shading pencil and sketch pen
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[@MRamzan-zn1vb]

But where is it clour

[@shanthashantha8276]

It is the shading drawing