Simple-Circle-Button.md

@@ -99,7 +99,7 @@ for (int i = 0; i < bmb.getPiecePlaceEnum().pieceNumber(); i++) {
     bmb.addBuilder(builder);
 }
 ```
-**Don't need to set every attributes for boom-buttons, just customize what you want.** For example:
+**Needn't to set every attributes for boom-buttons, just customize what you want.** For example:
 ```
 for (int i = 0; i < bmb.getPiecePlaceEnum().pieceNumber(); i++) {
     SimpleCircleButton.Builder builder = new SimpleCircleButton.Builder()