Adding screenshot, updating readme

README.md

 # Nitrogen Desktop Experience (NDE)
+
+![screenshot](screenshots/screenshot1.png)
+
 This is a project I've had ideas about for a few years.  The end goal is to create a DE
 (Desktop Environment) that can alter itself at runtime using various desktop agents which
 dictate the look and feel.
@@ -25,10 +28,35 @@ None yet.  :crying_cat_face:
 + [`x11/libX11`](https://www.freshports.org/x11/libX11/)
 + [`x11/xproto`](https://www.freshports.org/x11/xproto/)
 + [`devel/cmake`](https://www.freshports.org/devel/cmake/)
-+ [`devel/cmake-modules`](https://www.freshports.org/devel/cmake-modules/)
++ [`devel/cmake-modules`](https://www.freshports.org/devel/cmake-modules/) (if this port is not available, then it has been merged with [`devel/cmake`](https://www.freshports.org/devel/cmake/))
 + [`devel/boehm-gc`](https://www.freshports.org/devel/boehm-gc/)
 + [`devel/boehm-gc-threaded`](https://www.freshports.org/devel/boehm-gc-threaded/)
 
 ---
 ## Misc Tooling
 + [`devel/git`](https://www.freshports.org/devel/git/) **or** [`devel/git-gui`](https://www.freshports.org/devel/git-gui/)
+
+---
+## Building the NDE
+It's easy to build Nitrogen Desktop Experience.
+
+**Checkout**
+```console
+$ git clone https://felinewith.me/LadySerenaKitty/nitrogen.git
+$ cd nitrogen
+```
+
+**Prep for build**
+```console
+$ cmake .
+```
+
+**Build it!**
+```console
+$ make
+```
+
+**Test**
+```console
+$ ./test_Nitrogen.sh
+```

xinitrc

 xsetroot -solid grey &
-xclock &
-sleep 2 && xterm &
+xterm &
 
 exec src/NitroWin/build/bin/NitroWin