diff --git a/cmd/root.go b/cmd/root.go
index 187ed04..36955b3 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -28,6 +28,7 @@ Find more information at:
  https://github.com/qiniu/goc
 `,
 	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		log.DisplayGoc()
 		// init logger
 		log.NewLogger()
 	},
diff --git a/pkg/build/build.go b/pkg/build/build.go
index 3e35dba..81b6cc4 100644
--- a/pkg/build/build.go
+++ b/pkg/build/build.go
@@ -37,4 +37,6 @@ func (b *Build) Build() {
 
 	// inject cover vars
 	cover.Inject()
+
+	// build in the temp project
 }
diff --git a/pkg/cover/agent.tpl b/pkg/cover/agent.tpl
index 9421624..537c568 100644
--- a/pkg/cover/agent.tpl
+++ b/pkg/cover/agent.tpl
@@ -21,10 +21,16 @@ import (
 
 var (
 	waitDelay time.Duration = 10 * time.Second
-	host      string        = "127.0.0.1:8080"
+	host      string        = "{{.Host}}"
 )
 
 func init() {
+	// init host
+	host_env := os.Getenv("GOC_CUSTOM_HOST")
+	if host_env != "" {
+		host = host_env
+	}
+
 	var dialer = websocket.DefaultDialer
 
 	// 永不退出，出错后统一操作为：延时 + conitnue
@@ -116,9 +122,9 @@ func (ga *GocAgent) ResetProfile(req *ProfileReq, res *ProfileRes) error {
 		return fmt.Errorf("wrong command")
 	}
 
-	*res = `mode: atomic
-qiniu.com/kodo/apiserver/server/main.go:32.49,33.13 1 30
-qiniu.com/kodo/apiserver/server/main.go:42.49,43.13 1 0`
+	resetValues()
+
+	*res = `ok`
 
 	return nil
 }
@@ -162,6 +168,22 @@ func loadFileCover(coverCounters map[string][]uint32, coverBlocks map[string][]t
 	coverBlocks[fileName] = block
 }
 
+// reset counters
+func resetValues() {
+	{{range $i, $pkgCover := .Covers}}
+	{{range $file, $cover := $pkgCover.Vars}}
+	clearFileCover(_cover.{{$cover.Var}}.Count[:])
+	{{end}}
+	{{end}}
+}
+
+func clearFileCover(counter []uint32) {
+	for i := range counter {
+		counter[i] = 0
+	}
+}
+
+
 // get process meta info for register
 type processInfo struct {
 	hostname string
diff --git a/pkg/log/display.go b/pkg/log/display.go
new file mode 100644
index 0000000..39b7813
--- /dev/null
+++ b/pkg/log/display.go
@@ -0,0 +1,16 @@
+package log
+
+import "github.com/mgutz/ansi"
+
+const banner = `
+  __ _  ___   ___ 
+ / _  |/ _ \ / __|
+| (_| | (_) | (__ 
+ \__, |\___/ \___|
+ |___/ 
+
+`
+
+func DisplayGoc() {
+	stdout.Write([]byte(ansi.Color(banner, "cyan+b")))
+}