diff --git a/GOL/Engine.hs b/GOL/Engine.hs
new file mode 100644
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--- /dev/null
+++ b/GOL/Engine.hs
@@ -0,0 +1,13 @@
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeApplications #-}
+
+module GOL.Engine where
+
+import Control.Comonad.Env
+import Control.Comonad.Representable.Store
+import Data.Bool (bool)
+import GOL.Rule
+import GOL.Space
+
+type GOL f = EnvT Rule (Store f)
+