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diff --git a/src/Plugins/Monitors/Cpu.hs b/src/Plugins/Monitors/Cpu.hs
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+++ b/src/Plugins/Monitors/Cpu.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module      :  Plugins.Monitors.Cpu
+-- Copyright   :  (c) Andrea Rossato
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  Jose A. Ortega Ruiz <jao@gnu.org>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- A cpu monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Cpu where
+
+import Plugins.Monitors.Common
+import qualified Data.ByteString.Lazy.Char8 as B
+
+cpuConfig :: IO MConfig
+cpuConfig = mkMConfig
+       "Cpu: <total>%"
+       ["bar","total","user","nice","system","idle"]
+
+cpuData :: IO [Float]
+cpuData = do s <- B.readFile "/proc/stat"
+             return $ cpuParser s
+
+cpuParser :: B.ByteString -> [Float]
+cpuParser =
+    map (read . B.unpack) . tail . B.words . head . B.lines
+
+parseCPU :: IO [Float]
+parseCPU =
+    do (a,b) <- doActionTwiceWithDelay 750000 cpuData
+       let dif = zipWith (-) b a
+           tot = foldr (+) 0 dif
+           percent = map (/ tot) dif
+       return percent
+
+formatCpu :: [Float] -> Monitor [String]
+formatCpu [] = return $ repeat ""
+formatCpu xs = do
+  let t = foldr (+) 0 $ take 3 xs
+  b <- showPercentBar (100 * t) t
+  ps <- showPercentsWithColors (t:xs)
+  return (b:ps)
+
+runCpu :: [String] -> Monitor String
+runCpu _ =
+    do c <- io parseCPU
+       l <- formatCpu c
+       parseTemplate l