Simple-Circle-Button.md

@@ -77,7 +77,15 @@ for (int i = 0; i < bmb.getButtonPlaceEnum().buttonNumber(); i++) {
     bmb.addBuilder(builder);
 }
 ```
-Don't need to set every attributes for boom-buttons, just customize what you want. After adding builders to BMB, it is ready for a boom.
+Don't need to set every attributes for boom-buttons, just customize what you want. For example:
+```
+for (int i = 0; i < bmb.getButtonPlaceEnum().buttonNumber(); i++) {
+    SimpleCircleButton.Builder builder = new SimpleCircleButton.Builder()
+            .normalImageRes(R.drawable.jellyfish);
+    bmb.addBuilder(builder);
+}
+```
+After adding builders to BMB, it is ready for a boom.
 
 ### Piece Place Enum for Simple Circle Button
 | Number of Button | VHPiecePlaceEnum | Images |