diff --git a/kadai3-1/po3rin/README.md b/kadai3-1/po3rin/README.md
new file mode 100644
index 0000000..5303161
--- /dev/null
+++ b/kadai3-1/po3rin/README.md
@@ -0,0 +1,7 @@
+# Typing Game for Engineer
+
+## Start
+
+```bash
+$ go run main.go
+```
\ No newline at end of file
diff --git a/kadai3-1/po3rin/main.go b/kadai3-1/po3rin/main.go
new file mode 100644
index 0000000..6f84327
--- /dev/null
+++ b/kadai3-1/po3rin/main.go
@@ -0,0 +1,65 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"dojo2/kadai3-1/po3rin/question"
+	"fmt"
+	"io"
+	"math/rand"
+	"os"
+	"time"
+)
+
+var questions = question.List
+var num int
+
+const sec = 30000
+
+func input(r io.Reader) <-chan string {
+	ch := make(chan string)
+	go func() {
+		s := bufio.NewScanner(r)
+		for s.Scan() {
+			ch <- s.Text()
+		}
+		close(ch)
+	}()
+	return ch
+}
+
+func makeQuetion() string {
+	rand.Seed(time.Now().UnixNano())
+	q := questions[rand.Intn(len(questions))]
+	return q
+}
+
+func main() {
+	fmt.Printf("typing game start ! %v millsecound !", sec)
+	ch := input(os.Stdin)
+	q := makeQuetion()
+	fmt.Println("==============")
+	fmt.Println(q)
+	fmt.Print(">")
+
+	bc := context.Background()
+	tc := sec * time.Millisecond
+	ctx, cancel := context.WithTimeout(bc, tc)
+	defer cancel()
+
+	for {
+		select {
+		case answer := <-ch:
+			q := makeQuetion()
+			fmt.Println("==============")
+			fmt.Println(q)
+			fmt.Print(">")
+			if answer != q {
+				num++
+			}
+		case <-ctx.Done():
+			fmt.Printf("end! number of correct is %v\n", num)
+			os.Exit(1)
+		}
+	}
+}
diff --git a/kadai3-1/po3rin/question/question.go b/kadai3-1/po3rin/question/question.go
new file mode 100644
index 0000000..6b6d8c2
--- /dev/null
+++ b/kadai3-1/po3rin/question/question.go
@@ -0,0 +1,26 @@
+package question
+
+// List is question list
+var List = []string{
+	"ruby",
+	"python",
+	"node",
+	"go",
+	"php",
+	"nim",
+	"docker",
+	"rustc",
+	"docker-compose",
+	"scala",
+	"rails",
+	"git",
+	"npm",
+	"vim",
+	"brew",
+	"yarn",
+	"pip",
+	"dep",
+	"aws",
+	"gcloud",
+	"kubectl",
+}