comply the hero screen

Author: nb312

lib/layout_attribute_selector.dart

@@ -1,21 +1,18 @@
 import 'package:flutter/material.dart';
-import 'package:layout_demo_flutter/main_page.dart';
 import 'nbmain.dart';
-import 'package:layout_demo_flutter/view/row_column_selector.dart';
 
 void main() => runApp(new MyApp());
 
 class MyApp extends StatelessWidget {
-  // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Flutter layout',
       theme: ThemeData(
         primarySwatch: Colors.orange,
       ),
       home: Scaffold(
-        backgroundColor: Colors.green,
+        backgroundColor: Colors.white,
         body: NBMain(),
       ),
     );