diff --git a/README.md b/README.md
index caf3939..8463eb5 100644
--- a/README.md
+++ b/README.md
@@ -34,4 +34,8 @@ res/font.toml (configuration file, it configure how to read the font.bmp)
 src/Bitmap class, it used to load the font.bmp file.
 
 src/Font class, it read the font.bmp data by Bitmap class, 
-translate a string to a bitmap
\ No newline at end of file
+translate a string to a bitmap
+
+test folder used to test.
+
+main folder is only used to test now.
\ No newline at end of file