Grab the rectangle tool and draw a header for it. The height, you have to estimate how much you want. Balance is the main thing you need to concern. Then, apply the blending option as shown below. A black to white gradient with soft light blend mode. Create another rectangle, apply gradient overlay with setting as shown below. Put it 1px below the green bar. It will make it more details. Then, draw a 1 pixel line and put it right above the gap between the two bars you created before. Give it a darker color.