local gui_server = {
    children = nil;
    width = 100; -- %
    height = 100; -- %
    parent = nil;
}
gui_server.__index = gui_server

local function createGUIServer(w, h, c)
    local t = {
        width = w;
        height = h;
    }
    t.children = (c == nil or type(c) ~= "table") and {} or c;
    setmetatable(t, gui_server)

    return t
end

function gui_server:addChild(c)

end

function gui_sever:pxSize()
    if self.parent == nil then
        local w, h = term.getSize()
        return math.round(w / 100 * self.width), math.round(h / 100 * self.height)
    end

    local w, h = self.parent:pxSize()

    return math.round(w / 100 * self.width), math.round(h / 100 * self.height)
end