diff --git a/README.md b/README.md
index 766dbf2..ccc4b31 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,29 @@
 keep waking Windows up
 
-[![Go Report Card](https://goreportcard.com/badge/github.com/shu-go/vvin)](https://goreportcard.com/report/github.com/shu-go/vvin)
 ![MIT License](https://img.shields.io/badge/License-MIT-blue)
 
 # Usage
 
+```
+package main
+
+import (
+	"git.bigun.dev/evan/vvin"
+)
+
+// program implements vvin
+
+func main() {
+
+	// Bring this program's window to the top.
+	err := vvin.Vvin([]string{"topmost"})
+	if err != nil {
+		log.Println(err)
+	}
+}
+
+```
+
 ```
 Sub commands:
   minimize, min     minimize/restore
@@ -21,31 +40,32 @@ Options:
 ## minimize/restore
 
 ```
-> ./vvin -t Notepad min
+vvin.Vvin([]string{"-t", "notepad", "min"})
 
-> ./vvin -t Notepad min --restore
-> ./vvin -t Notepad min -r
+vvin.Vvin([]string{"-t", "notepad", "min", "--restore"})
+vvin.Vvin([]string{"-t", "notepad", "min", "-r"})
 ```
 
 ## resize
 
 ```
-> ./vvin -t notepad resize -x 0 -y 0 -w 60% -h 100%
+vvin.Vvin([]string{"-t", "notepad", "resize", "-x", "0", "-y", "0", "-w", "60%", "-h", "100%"})
 ```
 
 ## alpha
 
 ```
-> ./vvin -t notepad alpha 75%
+vvin.Vvin([]string{"-t", "notepad", "alpha", "75%"})
 ```
 
 ## always on top
 
 ```
+vvin.Vvin([]string{"-t", "notepad", "topmost"})
 > ./vvin -t notepad topmost
 
-> ./vvin -t notepad topmost --restore
-> ./vvin -t notepad topmost -r
+vvin.Vvin([]string{"-t", "notepad", "topmost", "--restore"})
+vvin.Vvin([]string{"-t", "notepad", "topmost", "-r"})
 ```
 
 ## wait
@@ -53,12 +73,13 @@ Options:
 ### wait for a window to appear
 
 ```
+vvin.Vvin([]string{"wait", "notepad"})
 > ./vvin wait notepad
 ```
 
 ### wait closed
 
 ```
-> ./vvin wait notepad --closed
+vvin.Vvin([]string{"wait", "notepad", "--closed"})
 ```