diff --git a/.gitignore b/.gitignore
index 9fcd83ad..e980e122 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .DS_Store
 *~
+vgcore.*
 *.swp
 packagecache
 /subprojects/fmt-4.1.0
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 3d99a247..d1dab300 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,14 @@
 {
     "files.associations": {
-        "atomic": "cpp"
+        "atomic": "cpp",
+        "array": "cpp",
+        "hash_map": "cpp",
+        "deque": "cpp",
+        "list": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "initializer_list": "cpp",
+        "string_view": "cpp",
+        "valarray": "cpp"
     }
 }
\ No newline at end of file
diff --git a/include/IModule.hpp b/include/IModule.hpp
new file mode 100644
index 00000000..e0b4dc24
--- /dev/null
+++ b/include/IModule.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+namespace waybar {
+  class IModule {
+	  public:
+      virtual ~IModule() {}
+      virtual auto update() -> void = 0;
+      virtual operator Gtk::Widget &() = 0;
+  };
+}
diff --git a/include/bar.hpp b/include/bar.hpp
index cc6ae2c5..ca59feeb 100644
--- a/include/bar.hpp
+++ b/include/bar.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <json/json.h>
 #include <gtkmm.h>
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
@@ -19,9 +20,11 @@ namespace waybar {
     auto setWidth(int) -> void;
     auto toggle() -> void;
   private:
+    auto _setupConfig() -> void;
     auto _setupWidgets() -> void;
     auto _setupCss() -> void;
     int _width = 10;
+    Json::Value _config;
     Glib::RefPtr<Gtk::StyleContext> _styleContext;
     Glib::RefPtr<Gtk::CssProvider> _cssProvider;
   };
diff --git a/include/client.hpp b/include/client.hpp
index 9d4af23b..81eabd2e 100644
--- a/include/client.hpp
+++ b/include/client.hpp
@@ -21,7 +21,8 @@ namespace waybar {
 
   struct Client {
     uint32_t height = 30;
-    std::string css_file = "./resources/style.css";
+    std::string cssFile = "./resources/style.css";
+    std::string configFile = "./resources/config";
 
     Gtk::Main gtk_main;
 
diff --git a/include/factory.hpp b/include/factory.hpp
new file mode 100644
index 00000000..d1ef5b28
--- /dev/null
+++ b/include/factory.hpp
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <json/json.h>
+#include "modules/clock.hpp"
+#include "modules/workspaces.hpp"
+#include "modules/battery.hpp"
+#include "modules/memory.hpp"
+#include "modules/cpu.hpp"
+
+namespace waybar {
+
+  class Factory {
+	  public:
+      Factory(Bar &bar, Json::Value config);
+      IModule &makeModule(std::string name);
+    private:
+      Bar &_bar;
+      Json::Value _config;
+  };
+
+}
diff --git a/include/modules/battery.hpp b/include/modules/battery.hpp
index 6047b7e0..83f6b737 100644
--- a/include/modules/battery.hpp
+++ b/include/modules/battery.hpp
@@ -6,12 +6,13 @@
 #include <iostream>
 #include <fmt/format.h>
 #include "util/chrono.hpp"
+#include "IModule.hpp"
 
 namespace waybar::modules {
 
   namespace fs = std::filesystem;
 
-  class Battery {
+  class Battery : public IModule {
     public:
       Battery();
       auto update() -> void;
diff --git a/include/modules/clock.hpp b/include/modules/clock.hpp
index 59bc1ab1..ec6abedc 100644
--- a/include/modules/clock.hpp
+++ b/include/modules/clock.hpp
@@ -4,12 +4,14 @@
 #include <fmt/format.h>
 #include <thread>
 #include "util/chrono.hpp"
+#include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Clock {
+  class Clock : public IModule {
     public:
       Clock();
+      auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
diff --git a/include/modules/cpu.hpp b/include/modules/cpu.hpp
index adf21b1b..e975ad56 100644
--- a/include/modules/cpu.hpp
+++ b/include/modules/cpu.hpp
@@ -5,12 +5,14 @@
 #include <sys/sysinfo.h>
 #include <thread>
 #include "util/chrono.hpp"
+#include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Cpu {
+  class Cpu : public IModule {
     public:
       Cpu();
+      auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
diff --git a/include/modules/memory.hpp b/include/modules/memory.hpp
index 367dfec5..1c40dac3 100644
--- a/include/modules/memory.hpp
+++ b/include/modules/memory.hpp
@@ -5,12 +5,14 @@
 #include <sys/sysinfo.h>
 #include <thread>
 #include "util/chrono.hpp"
+#include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Memory {
+  class Memory : public IModule {
     public:
       Memory();
+      auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
diff --git a/include/modules/workspaces.hpp b/include/modules/workspaces.hpp
index b596db97..71b2f6b6 100644
--- a/include/modules/workspaces.hpp
+++ b/include/modules/workspaces.hpp
@@ -1,16 +1,16 @@
 #pragma once
 
-#include <json/json.h>
 #include <fmt/format.h>
 #include "bar.hpp"
 #include "client.hpp"
 #include "util/chrono.hpp"
+#include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class WorkspaceSelector {
+  class Workspaces : public IModule {
     public:
-      WorkspaceSelector(waybar::Bar &bar);
+      Workspaces(waybar::Bar &bar);
       auto update() -> void;
       void updateThread();
       operator Gtk::Widget &();
diff --git a/resources/config b/resources/config
new file mode 100644
index 00000000..e29c97e1
--- /dev/null
+++ b/resources/config
@@ -0,0 +1,4 @@
+{
+    "modules-left": ["workspaces"],
+    "modules-right": ["cpu", "memory", "battery", "clock"]
+}
diff --git a/src/bar.cpp b/src/bar.cpp
index d8130c42..76bac20d 100644
--- a/src/bar.cpp
+++ b/src/bar.cpp
@@ -1,14 +1,11 @@
 #include <condition_variable>
 #include <gdk/gdkwayland.h>
 #include <thread>
+#include <fstream>
 #include "bar.hpp"
 #include "client.hpp"
+#include "factory.hpp"
 #include "util/chrono.hpp"
-#include "modules/clock.hpp"
-#include "modules/workspaces.hpp"
-#include "modules/battery.hpp"
-#include "modules/memory.hpp"
-#include "modules/cpu.hpp"
 
 static void handleGeometry(void *data, struct wl_output *wl_output, int32_t x,
   int32_t y, int32_t physical_width, int32_t physical_height, int32_t subpixel,
@@ -82,6 +79,7 @@ waybar::Bar::Bar(Client &client, std::unique_ptr<struct wl_output *> &&p_output)
   wl_output_add_listener(*output, &outputListener, this);
   window.set_title("waybar");
   window.set_decorated(false);
+  _setupConfig();
   _setupCss();
   _setupWidgets();
   gtk_widget_realize(GTK_WIDGET(window.gobj()));
@@ -100,19 +98,6 @@ waybar::Bar::Bar(Client &client, std::unique_ptr<struct wl_output *> &&p_output)
   wl_surface_commit(surface);
 }
 
-auto waybar::Bar::_setupCss() -> void
-{
-  _cssProvider = Gtk::CssProvider::create();
-  _styleContext = Gtk::StyleContext::create();
-
-  // load our css file, wherever that may be hiding
-  if (_cssProvider->load_from_path(client.css_file)) {
-    Glib::RefPtr<Gdk::Screen> screen = window.get_screen();
-    _styleContext->add_provider_for_screen(screen, _cssProvider,
-      GTK_STYLE_PROVIDER_PRIORITY_USER);
-  }
-}
-
 auto waybar::Bar::setWidth(int width) -> void
 {
   if (width == this->_width) return;
@@ -132,6 +117,36 @@ auto waybar::Bar::toggle() -> void
   wl_surface_commit(surface);
 }
 
+auto waybar::Bar::_setupConfig() -> void
+{
+  Json::Value root;
+  Json::CharReaderBuilder builder;
+  Json::CharReader* reader = builder.newCharReader();
+  std::string err;
+  std::ifstream file(client.configFile);
+  if (!file.is_open())
+    throw std::runtime_error("Can't open config file");
+  std::string str((std::istreambuf_iterator<char>(file)),
+    std::istreambuf_iterator<char>());
+  bool res = reader->parse(str.c_str(), str.c_str() + str.size(), &_config, &err);
+  delete reader;
+  if (!res)
+    throw std::runtime_error(err);
+}
+
+auto waybar::Bar::_setupCss() -> void
+{
+  _cssProvider = Gtk::CssProvider::create();
+  _styleContext = Gtk::StyleContext::create();
+
+  // load our css file, wherever that may be hiding
+  if (_cssProvider->load_from_path(client.cssFile)) {
+    Glib::RefPtr<Gdk::Screen> screen = window.get_screen();
+    _styleContext->add_provider_for_screen(screen, _cssProvider,
+      GTK_STYLE_PROVIDER_PRIORITY_USER);
+  }
+}
+
 auto waybar::Bar::_setupWidgets() -> void
 {
   auto &left = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
@@ -145,16 +160,25 @@ auto waybar::Bar::_setupWidgets() -> void
   box1.pack_start(center, false, false);
   box1.pack_end(right, true, true);
 
-  auto &clock = *new waybar::modules::Clock();
-  auto &workspace_selector = *new waybar::modules::WorkspaceSelector(*this);
-  auto &battery = *new waybar::modules::Battery();
-  auto &memory = *new waybar::modules::Memory();
-  auto &cpu = *new waybar::modules::Cpu();
+  Factory factory(*this, _config);
 
-  left.pack_start(workspace_selector, false, true, 0);
-  // center.pack_start(workspace_selector, true, false, 10);
-  right.pack_end(clock, false, false, 0);
-  right.pack_end(battery, false, false, 0);
-  right.pack_end(memory, false, false, 0);
-  right.pack_end(cpu, false, false, 0);
+  if (_config["modules-left"]) {
+    for (auto name : _config["modules-left"]) {
+      auto &module = factory.makeModule(name.asString());
+      left.pack_start(module, false, true, 0);
+    }
+  }
+  if (_config["modules-center"]) {
+    for (auto name : _config["modules-center"]) {
+      auto &module = factory.makeModule(name.asString());
+      center.pack_start(module, true, false, 10);
+    }
+  }
+  if (_config["modules-right"]) {
+    std::reverse(_config["modules-right"].begin(), _config["modules-right"].end());
+    for (auto name : _config["modules-right"]) {
+      auto &module = factory.makeModule(name.asString());
+      right.pack_end(module, false, false, 0);
+    }
+  }
 }
diff --git a/src/factory.cpp b/src/factory.cpp
new file mode 100644
index 00000000..a181a6e8
--- /dev/null
+++ b/src/factory.cpp
@@ -0,0 +1,20 @@
+#include "factory.hpp"
+
+waybar::Factory::Factory(Bar &bar, Json::Value config)
+  : _bar(bar), _config(config)
+{}
+
+waybar::IModule &waybar::Factory::makeModule(std::string name)
+{
+  if (name == "battery")
+    return *new waybar::modules::Battery();
+  if (name == "workspaces")
+    return *new waybar::modules::Workspaces(_bar);
+  if (name == "memory")
+    return *new waybar::modules::Memory();
+  if (name == "cpu")
+    return *new waybar::modules::Cpu();
+  if (name == "clock")
+    return *new waybar::modules::Clock();
+  throw std::runtime_error("Unknown module: " + name);
+}
diff --git a/src/modules/clock.cpp b/src/modules/clock.cpp
index 2fc32f86..c652e844 100644
--- a/src/modules/clock.cpp
+++ b/src/modules/clock.cpp
@@ -4,17 +4,22 @@ waybar::modules::Clock::Clock()
 {
   _label.get_style_context()->add_class("clock");
   _thread = [this] {
+    update();
     auto now = waybar::chrono::clock::now();
-    auto t = std::time(nullptr);
-    auto localtime = std::localtime(&t);
-    _label.set_text(
-        fmt::format("{:02}:{:02}", localtime->tm_hour, localtime->tm_min));
     auto timeout =
       std::chrono::floor<std::chrono::minutes>(now + std::chrono::minutes(1));
     _thread.sleep_until(timeout);
   };
 };
 
+auto waybar::modules::Clock::update() -> void
+{
+  auto t = std::time(nullptr);
+  auto localtime = std::localtime(&t);
+  _label.set_text(
+      fmt::format("{:02}:{:02}", localtime->tm_hour, localtime->tm_min));
+}
+
 waybar::modules::Clock::operator Gtk::Widget &() {
   return _label;
 }
diff --git a/src/modules/cpu.cpp b/src/modules/cpu.cpp
index dc7e7bbf..cde31287 100644
--- a/src/modules/cpu.cpp
+++ b/src/modules/cpu.cpp
@@ -5,16 +5,21 @@ waybar::modules::Cpu::Cpu()
 {
   _label.get_style_context()->add_class("cpu");
   _thread = [this] {
-    struct sysinfo info;
-    if (!sysinfo(&info)) {
-      float f_load = 1.f / (1 << SI_LOAD_SHIFT);
-      _label.set_text(fmt::format("{:.{}f}% ",
-      	info.loads[0] * f_load * 100 / get_nprocs(), 0));
-    }
+    update();
     _thread.sleep_for(chrono::seconds(10));
   };
 };
 
+auto waybar::modules::Cpu::update() -> void
+{
+  struct sysinfo info;
+  if (!sysinfo(&info)) {
+    float f_load = 1.f / (1 << SI_LOAD_SHIFT);
+    _label.set_text(fmt::format("{:.{}f}% ",
+      info.loads[0] * f_load * 100 / get_nprocs(), 0));
+  }
+}
+
 waybar::modules::Cpu::operator Gtk::Widget &() {
   return _label;
 }
diff --git a/src/modules/memory.cpp b/src/modules/memory.cpp
index 36387b0d..104c973c 100644
--- a/src/modules/memory.cpp
+++ b/src/modules/memory.cpp
@@ -5,15 +5,20 @@ waybar::modules::Memory::Memory()
 {
   _label.get_style_context()->add_class("memory");
   _thread = [this] {
-    struct sysinfo info;
-    if (!sysinfo(&info)) {
-      double available = (double)info.freeram / (double)info.totalram;
-      _label.set_text(fmt::format("{:.{}f}% ", available * 100, 0));
-    }
+    update();
     _thread.sleep_for(chrono::seconds(30));
   };
 };
 
+auto waybar::modules::Memory::update() -> void
+{
+  struct sysinfo info;
+  if (!sysinfo(&info)) {
+    double available = (double)info.freeram / (double)info.totalram;
+    _label.set_text(fmt::format("{:.{}f}% ", available * 100, 0));
+  }
+}
+
 waybar::modules::Memory::operator Gtk::Widget &() {
   return _label;
 }
diff --git a/src/modules/workspaces.cpp b/src/modules/workspaces.cpp
index 53135899..340921b6 100644
--- a/src/modules/workspaces.cpp
+++ b/src/modules/workspaces.cpp
@@ -2,7 +2,7 @@
 #include "ipc/client.hpp"
 
 static void handle_idle(void *data, struct org_kde_kwin_idle_timeout *timer) {
-	auto o = reinterpret_cast<waybar::modules::WorkspaceSelector *>(data);
+	auto o = reinterpret_cast<waybar::modules::Workspaces *>(data);
   if (o->thread) {
 	  delete o->thread;
     o->thread = nullptr;
@@ -10,7 +10,7 @@ static void handle_idle(void *data, struct org_kde_kwin_idle_timeout *timer) {
 }
 
 static void handle_resume(void *data, struct org_kde_kwin_idle_timeout *timer) {
-	auto o = reinterpret_cast<waybar::modules::WorkspaceSelector *>(data);
+	auto o = reinterpret_cast<waybar::modules::Workspaces *>(data);
   if (!o->thread) {
 	  o->updateThread();
   }
@@ -21,7 +21,7 @@ static const struct org_kde_kwin_idle_timeout_listener idle_timer_listener = {
 	.resumed = handle_resume,
 };
 
-waybar::modules::WorkspaceSelector::WorkspaceSelector(Bar &bar)
+waybar::modules::Workspaces::Workspaces(Bar &bar)
   : thread(nullptr), _bar(bar), _box(Gtk::manage(new Gtk::Box))
 {
   _box->get_style_context()->add_class("workspaces");
@@ -39,7 +39,7 @@ waybar::modules::WorkspaceSelector::WorkspaceSelector(Bar &bar)
   updateThread();
 }
 
-void waybar::modules::WorkspaceSelector::updateThread()
+void waybar::modules::Workspaces::updateThread()
 {
   thread = new waybar::util::SleeperThread([this] {
     update();
@@ -47,7 +47,7 @@ void waybar::modules::WorkspaceSelector::updateThread()
   });
 }
 
-auto waybar::modules::WorkspaceSelector::update() -> void
+auto waybar::modules::Workspaces::update() -> void
 {
   Json::Value workspaces = _getWorkspaces();
   for (auto it = _buttons.begin(); it != _buttons.end(); ++it) {
@@ -74,7 +74,7 @@ auto waybar::modules::WorkspaceSelector::update() -> void
   }
 }
 
-void waybar::modules::WorkspaceSelector::_addWorkspace(Json::Value node)
+void waybar::modules::Workspaces::_addWorkspace(Json::Value node)
 {
   auto pair = _buttons.emplace(node["num"].asInt(), node["name"].asString());
   auto &button = pair.first->second;
@@ -92,7 +92,7 @@ void waybar::modules::WorkspaceSelector::_addWorkspace(Json::Value node)
   button.show();
 }
 
-Json::Value waybar::modules::WorkspaceSelector::_getWorkspaces()
+Json::Value waybar::modules::Workspaces::_getWorkspaces()
 {
   uint32_t len = 0;
   Json::Value root;
@@ -110,6 +110,6 @@ Json::Value waybar::modules::WorkspaceSelector::_getWorkspaces()
   return root;
 }
 
-waybar::modules::WorkspaceSelector::operator Gtk::Widget &() {
+waybar::modules::Workspaces::operator Gtk::Widget &() {
   return *_box;
 }