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diff --git a/Anneal.hs b/Anneal.hs
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+module XMonadContrib.Anneal ( Rated(Rated), the_value, the_rating, anneal ) where
+
+data Rated a b = Rated !a !b
+                 deriving ( Show )
+instance Functor (Rated a) where
+    f `fmap` (Rated v a) = Rated v (f a)
+
+the_value :: Rated a b -> b
+the_value (Rated _ b) = b
+the_rating :: Rated a b -> a
+the_rating (Rated a _) = a
+
+instance Eq a => Eq (Rated a b) where
+    (Rated a _) == (Rated a' _) = a == a'
+instance Ord a => Ord (Rated a b) where
+    compare (Rated a _) (Rated a' _) = compare a a'
+
+anneal :: a -> (a -> Double) -> (a -> [a]) -> Rated Double a
+anneal = undefined