Dip your medium-sized paintbrush in a healthy, grass-green color. Mix in a touch of yellow.
Paint a straight vertical line 1 inch wide on the canvas, from the top to the bottom.
Dip a thinner paintbrush in the grass-green color. Mix in a touch of burnt umber, or a comparable shade of brown, and a touch of yellow.
Paint thin horizontal lines (no more than 1/4 inch wide) bisecting the bamboo stalk at regular intervals, from the bottom to the top. These lines should be between 3 to 5 inches from each other.
Dip your thin paintbrush in yellow paint.
Paint a horizontal line, as thin as possible, down the center of the horizontal lines you painted in step 4.