diff --git a/include/utils/Events/Event.h b/include/utils/Events/Event.h
index 26a7524..6d146c0 100644
--- a/include/utils/Events/Event.h
+++ b/include/utils/Events/Event.h
@@ -1,3 +1,30 @@
+#ifndef EVENT_H
+#define EVENT_H
+
 #include "pch.hpp"
 
-class Event {};
+namespace Archimedes {
+
+    class Event {
+
+        public:
+
+            enum class Type : unsigned int {
+                None = 0,
+                WindowEvent = 1 << 0,
+                KeyEvent = 1 << 1,
+                MouseMoveEvent = 1 << 2,
+                MouseScrollEvent = 1 << 3,
+                MouseButtonEvent = 1 << 4,
+                PressedEvent = 1 << 5,
+                ReleasedEvent = 1 << 6,
+                WindowCloseEvent = 1 << 7,
+                WindowResizeEvent = 1 << 8,
+            };
+
+            unsigned int type;
+        
+    };
+}
+
+#endif
diff --git a/include/utils/GuiModule/GuiModule.h b/include/utils/GuiModule/GuiModule.h
index a44cf9b..9cd2995 100644
--- a/include/utils/GuiModule/GuiModule.h
+++ b/include/utils/GuiModule/GuiModule.h
@@ -5,6 +5,8 @@
 
 #include "modules/WindowModule/src/WindowModule.h"
 
+#include "utils/Layers/Layer.h"
+
 namespace Archimedes {
 
     class GuiModule : public Module {
diff --git a/include/utils/Layers/Layer.h b/include/utils/Layers/Layer.h
index b334f4b..7ff5e1b 100644
--- a/include/utils/Layers/Layer.h
+++ b/include/utils/Layers/Layer.h
@@ -1,15 +1,25 @@
+#ifndef LAYER_H
+#define LAYER_H
+
 #include "pch.hpp"
 #include "utils/Events/Event.h"
 
-class Layer {
+namespace Archimedes {
+    
+    class Layer {
 
-    virtual ~Layer() {}
+        public:
 
-    virtual void onRender() = 0;
+            virtual ~Layer() {}
 
-    virtual void onAttach() = 0;
+            virtual void onRender() = 0;
 
-    virtual void onDetach() = 0;
+            virtual void onAttach() = 0;
 
-    virtual bool onEvent(const Event&) = 0;
-};
+            virtual void onDetach() = 0;
+
+            virtual bool onEvent(const Event&) = 0;
+    };
+}
+
+#endif
diff --git a/include/utils/Layers/Layerstack.h b/include/utils/Layers/Layerstack.h
index 3a829e2..365f350 100644
--- a/include/utils/Layers/Layerstack.h
+++ b/include/utils/Layers/Layerstack.h
@@ -1,31 +1,49 @@
+#ifndef LAYERSTACK_H
+#define LAYERSTACK_H
+
 #include "pch.hpp"
 #include "Layer.h"
 
-class Layerstack {
+namespace Archimedes {
+    class Layerstack {
 
-    public:
-        Layerstack() {}
+        public:
+            Layerstack() {}
 
-        ~Layerstack() {
-            while(!lstack.empty()) {
-                pop();
+            ~Layerstack() {
+                while(!lstack.empty()) {
+                    pop();
+                }
             }
-        }
 
-        void push(Layer* l) { lstack.push_front(l); }
+            void push(Layer* l) { 
+                lstack.push_front(l);
+                l->onAttach();
+            }
 
-        void pop() {
-            Layer* l = lstack.front();
-            lstack.pop_front();
-            delete l;
-        }
+            void pop() {
+                Layer* l = lstack.front();
+                lstack.pop_front();
+                l->onDetach();
+            }
 
-        void renderAll() {
-            for(Layer* l : lstack)
-                l->onRender();
-        }
+            void renderAll() {
+                for(Layer* l : lstack)
+                    l->onRender();
+            }
 
-    private:
+            void sendEvent(const Event& e) {
+                for(Layer* l : lstack) {
+                    if(l->onEvent(e)) {
+                        break;
+                    }
+                }
+            }
 
-        std::list<Layer*> lstack;
-};
+        private:
+
+            std::list<Layer*> lstack;
+    };
+}
+
+#endif
diff --git a/include/utils/Renderer/Renderer.h b/include/utils/Renderer/Renderer.h
index 610915e..e99a5b7 100644
--- a/include/utils/Renderer/Renderer.h
+++ b/include/utils/Renderer/Renderer.h
@@ -9,7 +9,6 @@ namespace Archimedes {
 
         public:
             int w, h;
-            typedef void renderCmd();
 
             ~Renderer() {}
 
@@ -19,12 +18,12 @@ namespace Archimedes {
                 r.render(rc, w, h);
             }
 
-            std::list<renderCmd*>& getCmdList() {
+            std::list<std::function<void()>>& getCmdList() {
                 return rc;
             }
 
         private:
-            std::list<renderCmd*> rc;
+            std::list<std::function<void()>> rc;
             RendererImpl r;
     };
 }
diff --git a/include/utils/Window/Window.h b/include/utils/Window/Window.h
index 1e51a18..32dd04c 100644
--- a/include/utils/Window/Window.h
+++ b/include/utils/Window/Window.h
@@ -11,9 +11,9 @@ namespace Archimedes {
 
         public:
 
-            Window() { renderer = new Renderer(); }
+            Window() {}
 
-            ~Window() { delete renderer; }
+            ~Window() {}
 
             bool shouldClose() { return window.shouldClose(); }
 
@@ -29,7 +29,7 @@ namespace Archimedes {
             }
 
             Renderer* getRenderer() { return renderer; }
-            //void setRenderer(Renderer* r) { renderer = r; }
+            void setRenderer(Renderer* r) { renderer = r; }
 
             WindowImpl& getWindowImpl() { return window; }
 
diff --git a/modules/WindowModule/src/WindowModule.cpp b/modules/WindowModule/src/WindowModule.cpp
index 55b108d..6721883 100644
--- a/modules/WindowModule/src/WindowModule.cpp
+++ b/modules/WindowModule/src/WindowModule.cpp
@@ -1,26 +1,33 @@
 #include "WindowModule.h"
 
 WindowModule::~WindowModule() {
-    if(window)
-        delete window;
+    if(layers)
+        delete layers;
     if(renderer)
         delete renderer;
+    if(window)
+        delete window;
 }
 
 void WindowModule::onLoad() {
 
     window = new Archimedes::Window();
-    //renderer = new Archimedes::Renderer();
-
-    //window->setRenderer(renderer);
     
-    renderer = window->getRenderer();
+    renderer = new Archimedes::Renderer();
+
+    window->setRenderer(renderer);
+    
+    //renderer = window->getRenderer();
+
+    layers = new Archimedes::Layerstack();
 
     if(!renderer->init()) {
         std::cout << "Renderer init failed!\n";
         std::abort();
     }
 
+    renderer->getCmdList().push_back([this](){ layers->renderAll(); });
+
     data["window"] = window->getWindowImpl().getWindow();
     data["renderCmdList"] = &renderer->getCmdList();
 }
diff --git a/modules/WindowModule/src/WindowModule.h b/modules/WindowModule/src/WindowModule.h
index d682257..0f0c10e 100644
--- a/modules/WindowModule/src/WindowModule.h
+++ b/modules/WindowModule/src/WindowModule.h
@@ -11,6 +11,7 @@
 
 #include "utils/Window/Window.h"
 #include "utils/Renderer/Renderer.h"
+#include "utils/Layers/Layerstack.h"
 
 class WindowModule : public Archimedes::Module {
 
@@ -27,12 +28,16 @@ class WindowModule : public Archimedes::Module {
         void onLoad();
         
         //interface for other modules
-        std::string sayHello() { return "Call from TestImgui!"; }
+        
+        Archimedes::Window* getWindow() { return window; }
+        Archimedes::Renderer* getRenderer() { return renderer; }
+        Archimedes::Layerstack* getLayerstack() { return layers; }
 
     private:
 
         Archimedes::Window* window;
         Archimedes::Renderer* renderer;
+        Archimedes::Layerstack* layers;
 
 };
 
diff --git a/modules/examples/GuiModules/TestImgui/src/TestImgui.cpp b/modules/examples/GuiModules/TestImgui/src/TestImgui.cpp
index 1dcc0e5..1a6a62f 100644
--- a/modules/examples/GuiModules/TestImgui/src/TestImgui.cpp
+++ b/modules/examples/GuiModules/TestImgui/src/TestImgui.cpp
@@ -12,64 +12,21 @@ TestImgui::TestImgui(void* h, Archimedes::App* a) : Archimedes::GuiModule(h, a)
 }
 
 TestImgui::~TestImgui() {
-    
-    std::list<Archimedes::Renderer::renderCmd*>* cmdList = 
-        std::any_cast<std::list<Archimedes::Renderer::renderCmd*>*>(depsInstances["WindowModule"]->getData("renderCmdList"));
-    cmdList->erase(rcmd);
     ImGui_ImplOpenGL3_Shutdown();
     ImGui_ImplGlfw_Shutdown();
     ImGui::DestroyContext();
 }
 
 void TestImgui::onLoad() {
-
+    
     WindowModule* wm = (WindowModule*) depsInstances["WindowModule"];
-    std::cout << "Say hello: " << wm->sayHello() << std::endl;
-
+    
     if(!wm) {
         std::cout << "No WindowModule for TestImgui!\n";
         std::abort();
     }
 
-    IMGUI_CHECKVERSION();
-    ImGui::CreateContext();
-    ImGuiIO& io = ImGui::GetIO(); (void)io;
-    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
-    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
-
-    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
-                                                              //io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
-
-                                                              // Setup Dear ImGui style
-    ImGui::StyleColorsDark();
-    //ImGui::StyleColorsLight();
-
-    // Setup Platform/Renderer backends
-    GLFWwindow* w = std::any_cast<GLFWwindow*>(wm->getData("window"));
-
-    if(!ImGui_ImplGlfw_InitForOpenGL(w, true))
-        std::cout << "GLFWImpl failed\n";
-    if(!ImGui_ImplOpenGL3_Init("#version 330")) {
-        std::cout << "ImGui_ImplOpenGL3_Init failed!\n" << std::endl;
-    }
-
-
-    std::list<Archimedes::Renderer::renderCmd*>* cmdList = 
-        std::any_cast<std::list<Archimedes::Renderer::renderCmd*>*>(wm->getData("renderCmdList"));
-
-    cmdList->push_back([](){
-            ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
-            });
-
-    rcmd = --cmdList->end();
-    cmdList->end()++;
-    
-    //Compute first frame ahead of first WindowModule->run()
-    ImGui_ImplOpenGL3_NewFrame();
-    ImGui_ImplGlfw_NewFrame();
-    ImGui::NewFrame();
-    
-    ImGui::Render();
+    wm->getLayerstack()->push(&layer);
 }
 
 void TestImgui::run() {
@@ -103,3 +60,53 @@ void TestImgui::run() {
     }
     ImGui::Render();
 }
+
+
+TestImgui::TILayer::~TILayer() {}
+
+void TestImgui::TILayer::onAttach() {
+    WindowModule* wm = (WindowModule*) ti->depsInstances["WindowModule"];
+
+    if(!wm) {
+        std::cout << "No WindowModule for TestImgui!\n";
+        std::abort();
+    }
+
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO(); (void)io;
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+
+    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;         // Enable Docking
+                                                              //io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;       // Enable Multi-Viewport / Platform Windows
+
+                                                              // Setup Dear ImGui style
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsLight();
+
+    // Setup Platform/Renderer backends
+    GLFWwindow* w = wm->getWindow()->getWindowImpl().getWindow();
+
+    if(!ImGui_ImplGlfw_InitForOpenGL(w, true))
+        std::cout << "GLFWImpl failed\n";
+    if(!ImGui_ImplOpenGL3_Init("#version 330")) {
+        std::cout << "ImGui_ImplOpenGL3_Init failed!\n" << std::endl;
+    }
+
+    //Compute first frame ahead of first WindowModule->run()
+    ImGui_ImplOpenGL3_NewFrame();
+    ImGui_ImplGlfw_NewFrame();
+    ImGui::NewFrame();
+    
+    ImGui::Render();
+}
+
+void TestImgui::TILayer::onRender() {
+    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+}
+
+void TestImgui::TILayer::onDetach() {
+}
+
+bool TestImgui::TILayer::onEvent(const Archimedes::Event&) { return false; }
diff --git a/modules/examples/GuiModules/TestImgui/src/TestImgui.h b/modules/examples/GuiModules/TestImgui/src/TestImgui.h
index 871e63c..9250b69 100644
--- a/modules/examples/GuiModules/TestImgui/src/TestImgui.h
+++ b/modules/examples/GuiModules/TestImgui/src/TestImgui.h
@@ -23,6 +23,27 @@ class TestImgui : public Archimedes::GuiModule {
         std::list<Archimedes::Renderer::renderCmd*>::iterator rcmd;
 
         Archimedes::Window* window;
+
+        class TILayer : public Archimedes::Layer {
+            public:
+
+                TILayer(TestImgui* _ti) : ti(_ti) {}
+
+                ~TILayer();
+
+                void onRender();
+
+                void onAttach();
+
+                void onDetach();
+
+                bool onEvent(const Archimedes::Event&);
+
+            private:
+
+                TestImgui* ti;
+
+        } layer = TILayer(this);
 };
 
 #ifdef TESTIMGUI_DYNAMIC