diff --git a/src/Main.hs b/src/Main.hs
index 3d4f3a6..8b34b8f 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -242,25 +242,25 @@ run = do
     -}
 
     (mt,tc,sleepAmount,frameTime) <- liftIO $ do
-        let 	double = fromRational.toRational :: (Real a) => a -> Double
-		targetFramerate = 60.0
-		targetFrametime = 1.0/targetFramerate
-		--targetFrametimeμs = targetFrametime * 1000000.0
+        let double = fromRational.toRational :: (Real a) => a -> Double
+        targetFramerate = 60.0
+        targetFrametime = 1.0/targetFramerate
+        --targetFrametimeμs = targetFrametime * 1000000.0
         now <- getCurrentTime
         let diff  = diffUTCTime now (state ^. io.clock) -- get time-diffs
             title = unwords ["Pioneers @ ",show ((round . double $ 1.0/diff)::Int),"fps"]
             ddiff = double diff
         SDL.setWindowTitle (env ^. windowObject) title
-        let 	sleepAmount = floor ((targetFrametime - double diff)*1000000) :: Int -- get time until next frame in microseconds
+        let     sleepAmount = floor ((targetFrametime - double diff)*1000000) :: Int -- get time until next frame in microseconds
                 clockFactor = (state ^. io.tessClockFactor)
-		tessChange
-			| (clockFactor < (75*targetFrametime)) && (state ^. gl.glMap.stateTessellationFactor < 5) = ((+)1 :: Int -> Int) 
-										-- > last 100 frames had > 25% leftover (on avg.)
-			| (clockFactor > (110*targetFrametime)) && (state ^. gl.glMap.stateTessellationFactor > 1) = (flip (-) 1 :: Int -> Int)
-									-- > last 100 frames had < 90% of target-fps
-			| otherwise = ((+)0 :: Int -> Int)              -- 0ms > x > 10% -> keep settings
+        tessChange
+            | (clockFactor < (75*targetFrametime)) && (state ^. gl.glMap.stateTessellationFactor < 5) = ((+)1 :: Int -> Int)
+                                        -- > last 100 frames had > 25% leftover (on avg.)
+            | (clockFactor > (110*targetFrametime)) && (state ^. gl.glMap.stateTessellationFactor > 1) = (flip (-) 1 :: Int -> Int)
+                                    -- > last 100 frames had < 90% of target-fps
+            | otherwise = ((+)0 :: Int -> Int)              -- 0ms > x > 10% -> keep settings
         when (sleepAmount > 0) $ threadDelay sleepAmount
-	now' <- getCurrentTime
+    now' <- getCurrentTime
         return (now',tessChange,sleepAmount,ddiff)
     -- set state with new clock-time
     --liftIO $ putStrLn $ unwords ["clockFactor:",show (state ^. io.tessClockFactor),"\ttc:", show (tc (state ^. gl.glMap.stateTessellationFactor)),"\tsleep ",show frameTime,"ms"]