Let’s get acquainted with these basic principles. A little bit of art theory is always good to know!
1-Mass: When drawing anything, there’s one very basic concept: mass. Mass is a shapeless space of any size. Mass is the foundation of your drawing.

2-Shapes: The next step is finding the shapes in the mass. At this point, the shapes are free-flowing and can be changed.

3-Form: You can add lines to create form. Form is when you refine the basic shapes.

4-Detail: Add more shapes and lines to create detail. Detail includes all the finer aspects—darkness, texture, etc.
