diff --git a/README.md b/README.md
index fac273e..8d17ca5 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ You can put your files to `esp` directory to read them in the OS.
 ![](assets/img/demo1.png)
 ![](assets/img/demo2.png)
 ![](assets/img/demo3.png)
+![](assets/img/demo4.png)
 
 ## Reference
 
diff --git a/assets/img/demo1.png b/assets/img/demo1.png
index 37ee18e..2e1a900 100644
Binary files a/assets/img/demo1.png and b/assets/img/demo1.png differ
diff --git a/assets/img/demo2.png b/assets/img/demo2.png
index 5d17723..24e10d2 100644
Binary files a/assets/img/demo2.png and b/assets/img/demo2.png differ
diff --git a/assets/img/demo3.png b/assets/img/demo3.png
index fb55047..ce8d212 100644
Binary files a/assets/img/demo3.png and b/assets/img/demo3.png differ
diff --git a/assets/img/demo4.png b/assets/img/demo4.png
new file mode 100644
index 0000000..88ac54d
Binary files /dev/null and b/assets/img/demo4.png differ