diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..0ca04ce
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module git.tetele.net/tgo/redis
+
+go 1.14
+
+require github.com/gomodule/redigo v2.0.0+incompatible // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4c1e172
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,3 @@
+github.com/gomodule/redigo v1.7.0 h1:ZKld1VOtsGhAe37E7wMxEDgAlGM5dvFY+DiOhSkhP9Y=
+github.com/gomodule/redigo v2.0.0+incompatible h1:K/R+8tc58AaqLkqG2Ol3Qk+DR/TlNuhuh457pBFPtt0=
+github.com/gomodule/redigo v2.0.0+incompatible/go.mod h1:B4C85qUVwatsJoIUNIfCRsp7qO0iAmpGFZ4EELWSbC4=
diff --git a/hash_test.go b/hash_test.go
index 41ad2b4..1b074d1 100644
--- a/hash_test.go
+++ b/hash_test.go
@@ -18,15 +18,19 @@ func Test_HSet(t *testing.T) {
 	// ret, err := HGetString("testing2", "test1")
 
 	// t.Log(ret)
-	// t.Log(err)
+	// if err == nil {
+	// 	t.Log("nil", err)
+	// } else {
+	// 	t.Log("error:", err)
+	// }
 
 	// ret2, err := HSetExpire("testing2", 200)
 	// t.Log(ret2)
 	// t.Log(err)
 
-	// ret3, err := HMSet("testing2", "test1", "test1", "test2", "test2", "test3", "test3")
-	// t.Log(ret3)
-	// t.Log(err)
+	ret3, err := HMSet("testing2", "test1", "test1")
+	t.Log(ret3)
+	t.Log(err)
 
 	ret4, err := HGetAll("1000064_product")
 	// ret := ret4.([]interface{})
diff --git a/int.go b/int.go
new file mode 100644
index 0000000..782563a
--- /dev/null
+++ b/int.go
@@ -0,0 +1,17 @@
+package redis
+
+func Incr(key string) (interface{}, error) {
+
+	c := pool.Get()
+	defer c.Close()
+
+	return c.Do("INCR", key)
+}
+
+func Decr(key string) (interface{}, error) {
+
+	c := pool.Get()
+	defer c.Close()
+
+	return c.Do("DECR", key)
+}
diff --git a/int_test.go b/int_test.go
new file mode 100644
index 0000000..49aa2f4
--- /dev/null
+++ b/int_test.go
@@ -0,0 +1,13 @@
+package redis
+
+import (
+	"testing"
+)
+
+func Test_Incr(t *testing.T) {
+	reply, err := Incr("xxx")
+	t.Log(reply, err)
+
+	reply, err := Decr("xxx")
+	t.Log(reply, err)
+}
diff --git a/string_test.go b/string_test.go
index 877fe81..79aa341 100644
--- a/string_test.go
+++ b/string_test.go
@@ -18,4 +18,6 @@ func Test_Set(t *testing.T) {
 	c, err := Set("test", 1111, 7200)
 	t.Log(c)
 	t.Log(err)
+	
+	p,err := pool.
 }
diff --git a/watch.go b/watch.go
new file mode 100644
index 0000000..793b601
--- /dev/null
+++ b/watch.go
@@ -0,0 +1,72 @@
+package redis
+
+import (
+	"errors"
+	"time"
+
+	redisdb "github.com/gomodule/redigo/redis"
+)
+
+type Tx struct {
+	conn redisdb.Conn
+}
+
+func NewTx() (*Tx, error) {
+	var conn redisdb.Conn
+	var i int = 0
+	var err error
+	for {
+		if i > 100 {
+			break
+		}
+		conn = pool.Get()
+		if conn != nil {
+			break
+		} else {
+			err = errors.New("no conn")
+		}
+		i++
+		time.Sleep(time.Microsecond * 1000)
+	}
+	if conn != nil {
+		n := &Tx{conn: pool.Get()}
+		return n, nil
+	} else {
+		return nil, err
+	}
+}
+
+func (tx *Tx) GetInt(key string) (int, error) {
+
+	return redisdb.Int(tx.conn.Do("GET", key))
+}
+
+func (tx *Tx) Watch(key string) (interface{}, error) {
+
+	return tx.conn.Do("WATCH", key)
+}
+
+func (tx *Tx) Multi() (interface{}, error) {
+
+	return tx.conn.Do("MULTI")
+}
+
+func (tx *Tx) Exec() (interface{}, error) {
+
+	return tx.conn.Do("Exec")
+}
+
+func (tx *Tx) Incr(key string) (interface{}, error) {
+
+	return tx.conn.Do("INCR", key)
+}
+
+func (tx *Tx) Decr(key string) (interface{}, error) {
+
+	return tx.conn.Do("DECR", key)
+}
+
+func (tx *Tx) Close() error {
+
+	return tx.conn.Close()
+}
diff --git a/watch_test.go b/watch_test.go
new file mode 100644
index 0000000..f131dc3
--- /dev/null
+++ b/watch_test.go
@@ -0,0 +1,71 @@
+package redis
+
+import (
+	"strconv"
+	"testing"
+	// "time"
+)
+
+var succ []int
+
+func Test_Watch(t *testing.T) {
+
+	var key string = "tttttt"
+
+	// var tx *Tx
+	var count int
+
+	for i := 0; i < 100000; i++ {
+
+		// t.Log(i)
+
+		go func(i int) {
+
+			// t.Log(i)
+			tx, err := NewTx()
+			// t.Log(tx, err)
+
+			if err == nil {
+
+				reply, err := tx.Watch(key)
+
+				// t.Log("watch:", reply, err)
+
+				count_str, err := Get(key)
+
+				count, _ = strconv.Atoi(count_str)
+
+				// t.Log("count:", count, err)
+
+				reply, err = tx.Multi()
+
+				// t.Log("Multi:", reply, err)
+
+				if count > 0 && err == nil {
+
+					// t.Log("start decr,", i)
+
+					reply, err = tx.Decr(key)
+
+					// t.Log("Decr:", reply, err)
+
+					reply, err = tx.Exec()
+
+					// t.Log("Exec:", exec_reply, err, i)
+
+					if err == nil && reply != nil {
+						// reply, err = HSet("succ", i, i)
+						succ = append(succ, i)
+						t.Log("succ:", i, succ)
+					}
+
+				}
+
+				err = tx.Close()
+				// t.Log("Close:", err)
+			}
+		}(i)
+	}
+
+	t.Log(succ)
+}