This is a sketch of the drawing, which I now paint.
I pointed the sunflower petals with a yellow pencil, and the contour with a brown pencil. As you can see, I used two colors.
Next, I used an orange-colored pencil to give the petals a shadow.
Next, I used an ordinary gray pencil to make a butterfly and give it a color.
Then I took a pencil of black and brown shades to draw sunflower seeds.
Next, I took three pencils of green, light green and black shades to draw a stem and sunflower petals.
This is the final result. I photographed this sunflower with my favorite little cactus ^ - ^