diff --git a/GOL/Space.hs b/GOL/Space.hs
new file mode 100644
index 0000000..52a7fa7
--- /dev/null
+++ b/GOL/Space.hs
@@ -0,0 +1,9 @@
+module GOL.Space where
+
+import Data.Functor.Rep
+
+class (Representable f, Rep f ~ s) => Space s f where
+  neighbors :: s -> [s]
+
+class (Space (Int, Int) f) => DisplayableSpace f where
+  size :: (Int, Int)
\ No newline at end of file
diff --git a/conways-game-of-life.cabal b/conways-game-of-life.cabal
index 47c6008..af5e877 100644
--- a/conways-game-of-life.cabal
+++ b/conways-game-of-life.cabal
@@ -7,7 +7,9 @@ build-type:     Simple
 cabal-version:  >= 1.8
 
 executable main
-  build-depends:  base,
-                  comonad,
-                  Yampa
-  main-is:        Main.hs
\ No newline at end of file
+  main-is:            Main.hs
+  build-depends:      base,
+                      comonad,
+                      Yampa,
+                      adjunctions
+  default-extensions: MultiParamTypeClasses
\ No newline at end of file