diff --git a/goping/goping.go b/goping/goping.go
index 5d9d390..e825520 100644
--- a/goping/goping.go
+++ b/goping/goping.go
@@ -114,6 +114,9 @@ func Ping(domain string, PS int) {
 
 	c := make(chan os.Signal, 1)
 	signal.Notify(c, os.Interrupt, os.Kill)
+	red := color.New(color.FgRed).SprintFunc()
+	green := color.New(color.FgGreen).SprintFunc()
+	yellow := color.New(color.FgYellow).SprintFunc()
 	for {
 		/*
 			向目标地址发送二进制报文包
@@ -153,8 +156,15 @@ func Ping(domain string, PS int) {
 			os.Exit(0)
 			fmt.Println("Got signal:", s)
 		default:
-			fmt.Printf("%d bytes from %s (%s): icmp_seq=%d ttl=53 time=%.3f ms\n", len, raddr.String(), raddr.String(), icmp_seq, dur)
-			//fmt.Printf("来自 %s 的回复: 大小 = %d byte 时间 = %.3fms\n", raddr.String(), len, dur)
+			if dur <= 30 {
+				fmt.Printf("%d bytes from %s (%s): icmp_seq=%d ttl=53 time=%.3f ms\n", len, raddr.String(), raddr.String(), icmp_seq, green(dur))
+			} else if dur <= 500 {
+				fmt.Printf("%d bytes from %s (%s): icmp_seq=%d ttl=53 time=%.3f ms\n", len, raddr.String(), raddr.String(), icmp_seq, yellow(dur))
+			} else {
+				fmt.Printf("%d bytes from %s (%s): icmp_seq=%d ttl=53 time=%.3f ms\n", len, raddr.String(), raddr.String(), icmp_seq, red(dur))
+				//fmt.Printf("来自 %s 的回复: 大小 = %d byte 时间 = %.3fms\n", raddr.String(), len, dur)
+			}
+
 			icmp_seq++
 			time.Sleep(time.Second)
 		}
diff --git a/readme.md b/readme.md
index 70deb01..ff47893 100644
--- a/readme.md
+++ b/readme.md
@@ -5,15 +5,15 @@ pong www.baidu.com 443 -t 1
 pong www.baidu.com 443 -t 1 -k udp
 pong -a www.baidu.com -p 443 -k tcp -t 3
 
-
 ## build
 ```bash
 cd /root
 rm -rf pong
 git clone https://git.sre.ink/go/pong.git
 cd pong
+CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on GOPROXY="https://goproxy.cn,direct" go mod tidy
 CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on GOPROXY="https://goproxy.cn,direct" go build -v -a -o pong pong.go
 rm -rf /usr/bin/pong
 mv pong /usr/bin/
 pong www.baidu.com 443
-```
\ No newline at end of file
+```