Create a rectangle 115px tall. It can be any width you prefer.
Choose 2 shades of color to use for the bar’s “true color” and shading. They should be quite dark and similar to each other in terms of shades. If working with color instead of gray scale, color theory states that lighter shades of color are “warmer”, and darker shades are “cooler”.
Choose 2 shades of color to use for the gloss. They should be relatively light to the “shading color” and similar as well.