diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..418384a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.DS_Store
+bee
+*.exe
+*.exe~
diff --git a/run.go b/run.go
index 503abf3..4fb3c97 100644
--- a/run.go
+++ b/run.go
@@ -68,7 +68,8 @@ var conf struct {
 func runApp(cmd *Command, args []string) {
 	exit := make(chan bool)
 	if len(args) != 1 {
-		colorLog("[ERRO] Argument [appname] is missing\n")
+		colorLog("[ERRO] Cannot start running[ %s ]\n",
+			"argument 'appname' is missing")
 		os.Exit(2)
 	}
 	crupath, _ := os.Getwd()
diff --git a/util.go b/util.go
index 026d8ed..2846b97 100644
--- a/util.go
+++ b/util.go
@@ -62,12 +62,16 @@ func colorLog(format string, a ...interface{}) {
 		log = log[i+1:]
 
 		// Error.
-		log = strings.Replace(log, "[ ", fmt.Sprintf("[ \033[%dm", Red), -1)
-		log = strings.Replace(log, " ]", EndColor+" ]", -1)
+		log = strings.Replace(log, "[ ", fmt.Sprintf("[\033[%dm", Red), -1)
+		log = strings.Replace(log, " ]", EndColor+"]", -1)
 
 		// Path.
-		log = strings.Replace(log, "(", fmt.Sprintf("(\033[%dm", Yellow), -1)
-		log = strings.Replace(log, ")", EndColor+")", -1)
+		log = strings.Replace(log, "( ", fmt.Sprintf("(\033[%dm", Yellow), -1)
+		log = strings.Replace(log, " )", EndColor+")", -1)
+
+		// Highlights.
+		log = strings.Replace(log, "# ", fmt.Sprintf("\033[%dm", Gray), -1)
+		log = strings.Replace(log, " #", EndColor, -1)
 
 		log = clog + log
 	}
@@ -79,6 +83,8 @@ func colorLog(format string, a ...interface{}) {
 func getColorLevel(level string) string {
 	level = strings.ToUpper(level)
 	switch level {
+	case "TRAC":
+		return fmt.Sprintf("\033[%dm%s\033[0m", Blue, level)
 	case "ERRO":
 		return fmt.Sprintf("\033[%dm%s\033[0m", Red, level)
 	case "WARN":
diff --git a/watch.go b/watch.go
index 1ce8d64..9f05e53 100644
--- a/watch.go
+++ b/watch.go
@@ -14,13 +14,14 @@ import (
 var (
 	cmd       *exec.Cmd
 	state     sync.Mutex
-	eventTime = make(map[string]time.Time)
+	eventTime = make(map[string]int64)
 )
 
 func NewWatcher(paths []string) {
 	watcher, err := fsnotify.NewWatcher()
 	if err != nil {
-		log.Fatal(err)
+		colorLog("[ERRO] Fail to create new Watcher[ %s ]\n", err)
+		os.Exit(2)
 	}
 
 	go func() {
@@ -37,15 +38,13 @@ func NewWatcher(paths []string) {
 					continue
 				}
 
-				if t, ok := eventTime[e.Name]; ok {
-					// if 500ms change many times, then ignore it.
-					// for liteide often gofmt code after save.
-					if t.Add(time.Millisecond * 500).After(time.Now()) {
-						colorLog("[SKIP] %s\n", e.String())
-						isbuild = false
-					}
+				mt := getFileModTime(e.Name)
+				if t := eventTime[e.Name]; mt == t {
+					colorLog("[SKIP] # %s #\n", e.String())
+					isbuild = false
 				}
-				eventTime[e.Name] = time.Now()
+
+				eventTime[e.Name] = mt
 
 				if isbuild {
 					colorLog("[EVEN] %s\n", e)
@@ -59,15 +58,34 @@ func NewWatcher(paths []string) {
 
 	colorLog("[INFO] Initializing watcher...\n")
 	for _, path := range paths {
-		fmt.Println(path)
+		colorLog("[TRAC] Directory( %s )\n", path)
 		err = watcher.Watch(path)
 		if err != nil {
-			log.Fatal(err)
+			colorLog("[ERRO] Fail to watch directory[ %s ]\n", err)
+			os.Exit(2)
 		}
 	}
 
 }
 
+// getFileModTime retuens unix timestamp of `os.File.ModTime` by given path.
+func getFileModTime(path string) int64 {
+	f, err := os.Open(path)
+	if err != nil {
+		colorLog("[ERRO] Fail to open file[ %s ]", err)
+		return time.Now().Unix()
+	}
+	defer f.Close()
+
+	fi, err := f.Stat()
+	if err != nil {
+		colorLog("[ERRO] Fail to get file information[ %s ]", err)
+		return time.Now().Unix()
+	}
+
+	return fi.ModTime().Unix()
+}
+
 func Autobuild() {
 	state.Lock()
 	defer state.Unlock()