diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab6a893..59d7038 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,4 +10,5 @@ pybind11_add_module(${PROJECT_NAME}  ${SRC})
 add_subdirectory(glfw)
 target_link_libraries(${PROJECT_NAME} PRIVATE glfw)
 find_package(OpenGl REQUIRED)
-target_link_libraries(${PROJECT_NAME} PRIVATE OpenGL::GL)
\ No newline at end of file
+target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_SOURCE_DIR}/include)
+target_link_libraries(${PROJECT_NAME} PRIVATE OpenGL::GL)
diff --git a/include/glpy.h b/include/glpy.h
new file mode 100644
index 0000000..5cd15bb
--- /dev/null
+++ b/include/glpy.h
@@ -0,0 +1,5 @@
+#pragma once
+
+namespace tests{
+    int glfw_window(unsigned width,unsigned height, std::string title);
+}
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index b04402b..7f150bc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,46 +1,17 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
-#include <GLFW/glfw3.h>
-
-int pytest_glfw_window()
-{
-    GLFWwindow* window;
-
-    /* Initialize the library */
-    if (!glfwInit())
-        return -1;
-
-    /* Create a windowed mode window and its OpenGL context */
-    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
-    if (!window)
-    {
-        glfwTerminate();
-        return -1;
-    }
-
-    /* Make the window's context current */
-    glfwMakeContextCurrent(window);
-
-    /* Loop until the user closes the window */
-    while (!glfwWindowShouldClose(window))
-    {
-        /* Render here */
-        glClear(GL_COLOR_BUFFER_BIT);
-
-        /* Swap front and back buffers */
-        glfwSwapBuffers(window);
-
-        /* Poll for and process events */
-        glfwPollEvents();
-    }
-
-    glfwTerminate();
-    return 0;
-}
+#include <glpy.h>
 
+namespace py = pybind11;
 
 
 PYBIND11_MODULE(glpy, m) {
     m.doc() = "glpy a python opengl project"; // optional module docstring
-    m.def("pytest_glfw_window",pytest_glfw_window);
+    auto tests = m.def_submodule("tests","the tests module");
+    
+    tests.def("glfw_window",&tests::glfw_window,
+        py::arg("width"),
+        py::arg("height"),
+        py::arg("title")
+        );
 }
\ No newline at end of file
diff --git a/src/test_window.cpp b/src/test_window.cpp
new file mode 100644
index 0000000..fead158
--- /dev/null
+++ b/src/test_window.cpp
@@ -0,0 +1,39 @@
+#include <pybind11/stl.h>
+#include <GLFW/glfw3.h>
+#include <glpy.h>
+
+int tests::glfw_window(unsigned width,unsigned height, std::string title)
+{
+    GLFWwindow* window;
+
+    /* Initialize the library */
+    if (!glfwInit())
+        return -1;
+
+    /* Create a windowed mode window and its OpenGL context */
+    window = glfwCreateWindow(width, height, title.c_str(), NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        return -1;
+    }
+
+    /* Make the window's context current */
+    glfwMakeContextCurrent(window);
+
+    /* Loop until the user closes the window */
+    while (!glfwWindowShouldClose(window))
+    {
+        /* Render here */
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        /* Swap front and back buffers */
+        glfwSwapBuffers(window);
+
+        /* Poll for and process events */
+        glfwPollEvents();
+    }
+
+    glfwTerminate();
+    return 0;
+}
\ No newline at end of file