diff --git a/announced.go b/announced.go
index c57534c..1c3eb29 100644
--- a/announced.go
+++ b/announced.go
@@ -12,7 +12,7 @@ type Announced struct {
 	collectors	[]*Collector
 }
 
-func NewAnnounced(ns NodeServer) *Announced {
+func NewAnnounced(ns *NodeServer) *Announced {
 	collects := []*Collector{
 		NewCollector("statistics"),
 		NewCollector("nodeinfo"),
@@ -21,7 +21,7 @@ func NewAnnounced(ns NodeServer) *Announced {
 	return &Announced{
 		ns,
 		NewNodes(),
-		output,
+		"webroot/nodes.json",
 		time.Second * time.Duration(15),
 		time.Second * time.Duration(15),
 		collects,
diff --git a/main.go b/main.go
index ecb7d95..a5ca00b 100644
--- a/main.go
+++ b/main.go
@@ -1,19 +1,42 @@
 package main
 
 import (
+	"flag"
 	"log"
+	"time"
 	"net/http"
 )
-
+var (
+	nodeserver	= NewNodeServer("/nodes")
+	nodes           = NewNodes()
+	outputFile      string
+	collectInterval time.Duration
+	saveInterval    time.Duration
+)
 func main(){
-	node := NewNodeServer("/nodes")
-	go node.Listen()
-	
-	annouced := NewAnnouced(node)
-	go annouced.Run()
+	var collectSeconds, saveSeconds int
 
+	flag.StringVar(&outputFile, "output", "nodes.json", "path output file")
+	flag.IntVar(&collectSeconds, "collectInterval", 15, "interval for data collections")
+	flag.IntVar(&saveSeconds, "saveInterval", 5, "interval for data saving")
+	flag.Parse()
+
+	collectInterval = time.Second * time.Duration(collectSeconds)
+	saveInterval = time.Second * time.Duration(saveSeconds)
+
+	collectors := []*Collector{
+		NewCollector("statistics"),
+		NewCollector("nodeinfo"),
+		NewCollector("neighbours"),
+	}	
+
+	go nodeserver.Listen()
+	
 	// static files
 	http.Handle("/", http.FileServer(http.Dir("webroot")))
 
 	log.Fatal(http.ListenAndServe(":8080", nil))
+	for _, c := range collectors {
+		c.Close()
+	}
 }
diff --git a/nodes.go b/nodes.go
index 2f16f07..0069569 100644
--- a/nodes.go
+++ b/nodes.go
@@ -70,12 +70,18 @@ func (nodes *Nodes) save() {
 	nodes.Unlock()
 
 	if err !=nil{
-		log.Panic(e)
+		log.Panic(err)
 	}
 	log.Println("saving", len(nodes.List), "nodes")
 
 	tmpFile := outputFile + ".tmp"
 
-	check(ioutil.WriteFile(tmpFile, data, 0644))
-	check(os.Rename(tmpFile, outputFile))
+	err = ioutil.WriteFile(tmpFile, data, 0644)
+	if err !=nil{
+		log.Panic(err)
+	}
+	err = os.Rename(tmpFile, outputFile)
+	if err !=nil{
+		log.Panic(err)
+	}
 }