Drawing mode

In this assignment, our class's topic is about drawing for designers, and we were learning about how to control making the lines when drawing with lines, and the homework was, we have to make 10 diffrent drawings with 2 versions, first in normal orientation(using our right brain), and the second, still by the same images, but we have to invert the samples, and we start drawing using our left-brain. Here are all my 20 drawings I've made...