Tulips as of Apr. 16, 2016 (Porter Mill Challenge #2)

I have been working on this drawing for the past few days. I am doing a set of four still life drawings for the Porter Mill Challenge. (The artists at Porter Mill have been challenged to produce one piece of art each week for four weeks, with the results to be displayed in a show in May.) Each of my drawings will have the same slightly off-center composition, and will show a container of flowers on a patterned tablecloth. Today I concentrated on the vase, measuring and checking and revising for symmetry. I also added color and highlights to the vase. I plan to make some small changes and to sharpen up colors and lines, but this is the basic drawing.