Update README, add build requirements

README

@@ -10,4 +10,14 @@ Requirements
 * sdl2
 * sdl2-ttf
 * fontconfig
-* Liberation Mono fonts
+* Liberation Mono fonts
+
+Build requirements
+==================
+* autoconf
+* automake
+* pkg-config
+
+If you run GNU Guix, please use the following package scheme in the URL below:
+
+   https://forge.chapril.org/pradana.aumars/pong/raw/branch/master/pong.scm

pong.scm

@@ -0,0 +1,35 @@
+(use-modules (guix packages)
+	     (guix download)
+	     (guix build-system gnu)
+	     (guix licenses)
+	     (gnu packages sdl)
+	     (gnu packages fontutils)
+	     (gnu packages fonts)
+	     (gnu packages autotools)
+	     (gnu packages pkg-config))
+
+(package
+   (name "pong")
+   (version "0.1-alpha")
+   (source (origin
+	    (method url-fetch)
+	    (uri (string-append "https://forge.chapril.org/pradana.aumars/pong/archive/" version
+				".tar.gz"))
+	    (sha256
+	     (base32
+	      "0wcwbaw51bj865fhhc55zz433zgskchjsw63nxa2zskj1ww0xfsj"))))
+   (build-system gnu-build-system)
+   (inputs
+    `(("sdl2" ,sdl2)
+      ("sdl2-ttf" ,sdl2-ttf)
+      ("fontconfig" ,fontconfig)
+      ("font-liberation" ,font-liberation)))
+    (native-inputs
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("pkg-config" ,pkg-config)))
+   (synopsis "Implementation of Pong")
+   (description
+    "This is a basic implementation of Pong. It's not very good.")
+   (home-page "https://forge.chapril.org/pradana.aumars/pong")
+   (license gpl3))