for x in range(0, width, self.HORIZONTAL_STEP):
hue = float(x) / float(width)
r,g,b = colorsys.hsv_to_rgb(hue, saturation, value)
for x in range(0, width, self.HORIZONTAL_STEP):
hue = float(x) / float(width)
r,g,b = colorsys.hsv_to_rgb(hue, saturation, value)