 
 	// main loop
 	double time = glfwGetTime();
+	int sec = 0;
 	while (!glfwWindowShouldClose(window))
 	{
 		// update viewport

		// calculate delta time
		float delta = (float)(glfwGetTime() - time);
		time = glfwGetTime();

		// update process
		update(delta);


	// make context current
	glfwMakeContextCurrent(window);

	// turn off vsync
	glfwSwapInterval(0);
}

Application::~Application(void)
