diff --git a/concurrency/rate_limiting_test.go b/concurrency/rate_limiting_test.go
deleted file mode 100644
index f58131a..0000000
--- a/concurrency/rate_limiting_test.go
+++ /dev/null
@@ -1,105 +0,0 @@
-package concurrency
-
-import (
-	"fmt"
-	"testing"
-	"time"
-)
-
-/*
-
-Rate limiting is an very important mechanism
-With limiting you can controll resource utilization and maintain quality of service.
-Go  supports rate limiting by using goroutines, channels, and tickers.
-*/
-
-func TestRateLimiting(t *testing.T) {
-	requests := make(chan int, 5)
-	for i := 1; i <= 5; i++ {
-		requests <- i
-	}
-	close(requests)
-
-	limiter := time.Tick(200 * time.Millisecond)
-
-	for req := range requests {
-		<-limiter
-		t.Log("Sev request by 2000 Millisecond", req, time.Now())
-	}
-
-	burstyLimiter := make(chan struct{}, 3)
-
-	//init burstyLimiter
-	for i := 0; i < 3; i++ {
-		burstyLimiter <- struct{}{}
-	}
-	go func() {
-		for {
-			select {
-			case <-time.Tick(200 * time.Millisecond):
-				burstyLimiter <- struct{}{}
-			}
-
-		}
-	}()
-
-	//max request queue
-	burstyRequestsQueue := make(chan int, 5)
-	for i := 1; i <= 5; i++ {
-		burstyRequestsQueue <- i
-	}
-	close(burstyRequestsQueue)
-
-	for req := range burstyRequestsQueue {
-		<-burstyLimiter
-		if len(burstyLimiter) > 0 {
-			fmt.Println("working current in bursting status!")
-		} else {
-			fmt.Println("working current in normal status!")
-		}
-		fmt.Println("request handled", req, time.Now())
-	}
-
-	rateLimiting()
-
-}
-
-func rateLimiting() {
-
-	requests := make(chan int, 5)
-	for i := 1; i <= 5; i++ {
-		requests <- i
-	}
-	close(requests)
-
-	limiter := time.Tick(200 * time.Millisecond)
-
-	for req := range requests {
-		<-limiter
-		fmt.Println("request", req, time.Now())
-	}
-
-	//突发限流器
-	burstyLimiter := make(chan time.Time, 3)
-
-	for i := 0; i < 3; i++ {
-		burstyLimiter <- time.Now()
-	}
-
-	go func() {
-		for t := range time.Tick(200 * time.Millisecond) {
-			burstyLimiter <- t
-		}
-	}()
-
-	//请求队列
-	burstyRequests := make(chan int, 5)
-	for i := 1; i <= 5; i++ {
-		burstyRequests <- i
-	}
-	close(burstyRequests)
-	for req := range burstyRequests {
-		<-burstyLimiter
-		fmt.Println("request", req, time.Now())
-	}
-}
diff --git a/gomore/27_messages/messaging.go b/gomore/27_messages/message.go
similarity index 93%
rename from gomore/27_messages/messaging.go
rename to gomore/27_messages/message.go
index 060ce9b..df860f0 100644
--- a/gomore/27_messages/messaging.go
+++ b/gomore/27_messages/message.go
@@ -48,6 +48,11 @@ type Topic struct {
 	MessageHistory []Message //当前主题的消息历史,实际项目中需要限定大小并设置过期时间
 }
 
+//MesssageQueue of manager all topics
+type MesssageQueue struct {
+	Topics map[uint64]*Topic
+}
+
 //String remove Subscription
 func (t *Topic) String() string {
 	return t.Name
diff --git a/gomore/27_messages/message_test.go b/gomore/27_messages/message_test.go
new file mode 100644
index 0000000..6f1b26f
--- /dev/null
+++ b/gomore/27_messages/message_test.go
@@ -0,0 +1,15 @@
+package gomore
+
+import "testing"
+
+func TestMessageSubAndPub(t *testing.T) {
+
+	//创建一个队列
+	msgQueue := MesssageQueue{Topics: map[uint64]*Topic{}}
+
+	//创建一个话题
+	topic := Topic{}
+
+	//像队列订阅话题
+	topic.Subscribe(123)
+}
diff --git a/gomore/27_messages/messaging_test.go b/gomore/27_messages/messaging_test.go
deleted file mode 100644
index b6d74ab..0000000
--- a/gomore/27_messages/messaging_test.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package gomore
-
-import "testing"
-
-func TestMessageSubAndPub(t *testing.T) {
-	topic := Topic{}
-	topic.Subscribe(123)
-}
diff --git a/gomore/README.md b/gomore/README.md
index 01b94bd..ccb76dd 100644
--- a/gomore/README.md
+++ b/gomore/README.md
@@ -1,3 +1,5 @@
 # go more
 
 基于go的语言特性,在go的领域可以更容易的实现更多的高效并且有趣的模式.
+
+同步并发处理中的一些常用模式 
\ No newline at end of file
diff --git a/gomore/semaphore/semaphore.go b/gomore/semaphore/semaphore.go
new file mode 100644
index 0000000..82f53e3
--- /dev/null
+++ b/gomore/semaphore/semaphore.go
@@ -0,0 +1,49 @@
+package semaphore
+
+import (
+	"errors"
+	"time"
+)
+
+var (
+	ErrNoTickets      = errors.New("semaphore: could not aquire semaphore")
+	ErrIllegalRelease = errors.New("semaphore: can't release the semaphore without acquiring it first")
+)
+
+// Interface contains the behavior of a semaphore that can be acquired and/or released.
+type Interface interface {
+	Acquire() error
+	Release() error
+}
+
+type implementation struct {
+	sem     chan struct{}
+	timeout time.Duration
+}
+
+func (s *implementation) Acquire() error {
+	select {
+	case s.sem <- struct{}{}:
+		return nil
+	case <-time.After(s.timeout):
+		return ErrNoTickets
+	}
+}
+
+func (s *implementation) Release() error {
+	select {
+	case _ = <-s.sem:
+		return nil
+	case <-time.After(s.timeout):
+		return ErrIllegalRelease
+	}
+
+	return nil
+}
+
+func New(tickets int, timeout time.Duration) Interface {
+	return &implementation{
+		sem:     make(chan struct{}, tickets),
+		timeout: timeout,
+	}
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..9443943
--- /dev/null
+++ b/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/logrusorgru/aurora" //这是一个控制台可以多种颜色输出的颜色库
+)
+
+func main() {
+
+	startGo := letsGo()
+	fmt.Sprintln(aurora.Green(startGo))
+}
+
+func letsGo() string {
+	return fmt.Sprintln("start go!")
+}
diff --git a/syncs/README.md b/syncs/README.md
deleted file mode 100644
index ff76b98..0000000
--- a/syncs/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# 同步模式
-
-s同步处理中的一些常用模式 
\ No newline at end of file