diff --git a/README_ru.md b/README_ru.md
index ebff3d4..b60cee2 100644
--- a/README_ru.md
+++ b/README_ru.md
@@ -131,11 +131,11 @@ AIO Launcher включает в себя интерпретатор LuaJ 3.0.1
 * `get_index(table, value)` - возвращает индекс элемента таблицы;
 * `get_key(table, value)` - возвращает ключ элемента таблицы;
 * `round(x, n)` - округляет число;
-* `md_colors` - таблица цветов Material Design (исходник есть в этом репозитории, [справка](https://materialui.co/colors));
 
 В комплект также входят:
 
-* url - функции для кодирования/декодирования строки в URL из библиотеки Lua Penlight;
+* `md_colors` - модуль-таблица цветов Material Design (исходник есть в этом репозитории, [справка](https://materialui.co/colors));
+* `url` - модуль с функциями для кодирования/декодирования строки в URL из библиотеки Lua Penlight;
 * [luaDate](https://github.com/Tieske/date) - функции для работы со временем;
 * [json.lua](https://github.com/rxi/json.lua) - парзер JSON;
 * [SLAXDOM](https://github.com/Phrogz/SLAXML) - парзер XML;
diff --git a/lib/md_colors.lua b/lib/md_colors.lua
index 44a59f0..6debba1 100644
--- a/lib/md_colors.lua
+++ b/lib/md_colors.lua
@@ -293,3 +293,5 @@ md_colors = {
     blue_grey_800="#37474F",
     blue_grey_900="#263238",
 }
+
+return md_colors
diff --git a/lib/url.lua b/lib/url.lua
new file mode 100644
index 0000000..8c7cfeb
--- /dev/null
+++ b/lib/url.lua
@@ -0,0 +1,51 @@
+--- Python-style URL quoting library.
+--
+-- @module pl.url
+
+local url = {}
+
+local function quote_char(c)
+    return string.format("%%%02X", string.byte(c))
+end
+
+--- Quote the url, replacing special characters using the '%xx' escape.
+-- @string s the string
+-- @bool quote_plus Also escape slashes and replace spaces by plus signs.
+-- @return The quoted string, or if `s` wasn't a string, just plain unaltered `s`.
+function url.quote(s, quote_plus)
+    if type(s) ~= "string" then
+        return s
+    end
+
+    s = s:gsub("\n", "\r\n")
+    s = s:gsub("([^A-Za-z0-9 %-_%./])", quote_char)
+    if quote_plus then
+        s = s:gsub(" ", "+")
+        s = s:gsub("/", quote_char)
+    else
+        s = s:gsub(" ", "%%20")
+    end
+
+    return s
+end
+
+local function unquote_char(h)
+    return string.char(tonumber(h, 16))
+end
+
+--- Unquote the url, replacing '%xx' escapes and plus signs.
+-- @string s the string
+-- @return The unquoted string, or if `s` wasn't a string, just plain unaltered `s`.
+function url.unquote(s)
+    if type(s) ~= "string" then
+        return s
+    end
+
+    s = s:gsub("+", " ")
+    s = s:gsub("%%(%x%x)", unquote_char)
+    s = s:gsub("\r\n", "\n")
+
+    return s
+end
+
+return url
diff --git a/main/actions-widget.lua b/samples/actions-widget.lua
similarity index 94%
rename from main/actions-widget.lua
rename to samples/actions-widget.lua
index c37498c..1e34942 100644
--- a/main/actions-widget.lua
+++ b/samples/actions-widget.lua
@@ -4,6 +4,8 @@
 -- author = "Evgeny Zobnin (zobnin@gmail.com)"
 -- version = "1.0"
 
+md_colors = require "md_colors"
+
 function on_resume()
     actions_names = { "Drawer", "Search", "Notify", "Menu" }
     actions_colors = { md_colors.purple_800, md_colors.purple_600, md_colors.purple_400, md_colors.purple_300 }
diff --git a/samples/app-buttons-sample.lua b/samples/app-buttons-sample.lua
index c2d1984..3aeb328 100644
--- a/samples/app-buttons-sample.lua
+++ b/samples/app-buttons-sample.lua
@@ -1,3 +1,5 @@
+md_colors = require "md_colors"
+
 function on_resume()
     apps_names = { "Telegram", "WhatsApp", "Google PLay" }
     apps_pkgs = { "org.telegram.messenger.web", "com.whatsapp", "com.android.vending" }