name = "DVD"
authors = {"AviiNL"}
description = "Bouncing 'dvd' Logo"

local width = g13.display_width
local height = g13.display_height

local x = 22.0
local y = 6.0

local x_direction = 1
local y_direction = 1

local speed = 20

local size = 3

function update(delta: number)
    x = x + speed * delta * x_direction
    y = y + speed * delta * y_direction

    if x <= size or x >= width - size then
        x_direction = -x_direction
    end

    if y <= size or y >= height - size then
        y_direction = -y_direction
    end

    color_x = (x / width) * 255
    color_y = (y / height) * 255
    color_z = 255 - (color_x + color_y) / 2

    g13.set_color(color_x/2, color_y/2, color_z/2)

    g13.clear()

    for sy = -size,size do
        for sx = -size,size do
            g13.set_pixel(x + sx, y + sy, true)
        end
    end
end