clock.lua

function(ptr)
    local cr = cairo.Context(ptr)
    
    local center_x = 21
    local center_y = 21
    local radius = 18

    local date_table = os.date("*t")

    local hours = date_table["hour"]
    local minutes = date_table["min"]
    local seconds = date_table["sec"]

    local hours_str = tostring(hours)
    if string.len(hours_str) == 1 then
        hours_str = "0" .. hours_str
    end

    local minutes_str = tostring(minutes)
    if string.len(minutes_str) == 1 then
        minutes_str = "0" .. minutes_str
    end

    local seconds_str = tostring(seconds)
    if string.len(seconds_str) == 1 then
        seconds_str = "0" .. seconds_str
    end

    local font_size = radius / 5.5

    cr:set_source_rgb(1.0, 1.0, 1.0)

    cr:move_to(center_x - font_size * 2.5, center_y + font_size / 2.5)
    cr:set_font_size(font_size)
    cr:show_text(hours_str .. ':' .. minutes_str .. ':' .. seconds_str)
    cr:stroke()

    if hours > 12 then
        hours = hours - 12
    end

    local line_width = radius / 8
    local start_angle = -math.pi / 2

    local end_angle = start_angle + ((hours + minutes / 60 + seconds / 3600) / 12) * 2 * math.pi
    cr:set_line_width(line_width)
    cr:arc(center_x, center_y, radius, start_angle, end_angle)
    cr:stroke()

    end_angle = start_angle + ((minutes + seconds / 60) / 60) * 2 * math.pi
    cr:set_line_width(line_width)
    cr:arc(center_x, center_y, radius * 0.8, start_angle, end_angle)
    cr:stroke()

    if seconds == 0 then
        seconds = 60
    end

    end_angle = start_angle + (seconds / 60) * 2 * math.pi
    cr:set_line_width(line_width)
    cr:arc(center_x, center_y, radius * 0.6, start_angle, end_angle)
    cr:stroke()

    return 0
end