# palette-specific (c64 original) fade to black

color_ramps = {
    2: 16,
    3: 10,
    4: 15,
    5: 12,
    6: 12,
    7: 12,
    8: 9,
    9: 10,
    10: 12,
    11: 3,
    12: 1,
    13: 12,
    14: 6,
    15: 7,
    16: 13
}

for frame, layer, x, y in TileIter(self):
    fg = self.get_fg_color_index_at(frame, layer, x, y)
    fg = color_ramps.get(fg, 1)
    self.set_color_at(frame, layer, x, y, fg, fg=True)
    bg = self.get_bg_color_index_at(frame, layer, x, y)
    bg = color_ramps.get(bg, 1)
    self.set_color_at(frame, layer, x, y, bg, fg=False)