diff --git a/echo-%E5%91%BD%E4%BB%A4.md b/echo-%E5%91%BD%E4%BB%A4.md
index 369ed4a..20709cd 100644
--- a/echo-%E5%91%BD%E4%BB%A4.md
+++ b/echo-%E5%91%BD%E4%BB%A4.md
@@ -57,3 +57,10 @@ echo 可以显示变量的值：
 | \r | 回车 |
 | \\ | 反斜杠字符本身 |
 
+
+`echo -n "Progress: ["`  
+`for i in {1..20}; do`  
+`echo -n "#"`  
+`sleep 0.1`  
+`done`  
+`echo "] Done!"`
\ No newline at end of file