The top sample is finish, the idea in these color paper renderings is to valance and blend the paper with your sketch.
Draw a perspective, orthographic views and inspiration drawing in a 8.5 x 11 paper. Scan the drawing and print it multiple time in order to practice new layout and ways to use the markers. Sample of layout exploration.
Biomimicry= inspiration from nature.
These samples will help you to understand the concept of designing based on inspiration from nature.