What you need:Oil pastels
Step 2 & 3
May be you prefer to create a common ground by toning my gessoed paper. For this, use a transparent mixture of matte medium and burnt sienna acrylic paint. Using the matte medium both strengthens the piece and protects the drawing, so you can scrape away sections of the oil pastel as needed, without damaging the original piece. A couple thin layers works best. This mixture dries fast and you are able to begin working with oil pastels soon afterward.
First, add a thin layer of gray for the glass counter. Then layer white on top of that and blend them together with your finger. With Vandyke brown, begin defining the background shapes.
Step 4 & 5
Continue using the Vandyke brown to define darks throughout. Then, put a layer of olive green across the entire background. Also add yellow ocher to certain areas and increase the saturation of Vandyke brown.
Using your finger, smudge and blend everything. Then draw back into it using Vandyke Brown.
Step 6 & 7
Add a thin layer of yellow ocher on the glass counter top and blend. At this point, add white for the highlights.
For this step, introduce orange, light yellow and light magenta to the bottles, and follow this by smudging the colors. Continue using Vandyke brown for the darks of the bottles. Next, add gray in the glass bottles. Selected areas are accented with pale blue, and use brown to darken the orange in areas. Work with all the previously introduced colors to block in shapes.