40 static GLFWwindow* windows[2];  variable
137     windows[0] = open_window("First", NULL, OFFSET, OFFSET);  in main()
138     if (!windows[0])  in main()
149     glfwGetWindowPos(windows[0], &x, &y);  in main()
150     glfwGetWindowSize(windows[0], &width, NULL);  in main()
153     windows[1] = open_window("Second", windows[0], x + width + OFFSET, y);  in main()
154     if (!windows[1])  in main()
161     glfwMakeContextCurrent(windows[0]);  in main()
163     glfwMakeContextCurrent(windows[1]);  in main()
166     glfwMakeContextCurrent(windows[0]);  in main()
168     while (!glfwWindowShouldClose(windows[0]) &&  in main()
169            !glfwWindowShouldClose(windows[1]))  in main()
171         glfwMakeContextCurrent(windows[0]);  in main()
174         glfwMakeContextCurrent(windows[1]);  in main()
177         glfwSwapBuffers(windows[0]);  in main()
178         glfwSwapBuffers(windows[1]);  in main()