Column Isuue

column.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
    runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        title: 'Flutter Demo',
        home: new Scaffold( // 1
            appBar: new AppBar(
                title: new Text("Demo"), // screen title
            ),
            body: new MyContainer()
        )
    );
  }
}


class MyContainer extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
        
        return new Container(
            color: Colors.cyan,
            height: 400.0,
            width: 400.0,
            child: new Stack(
                children: <Widget>[
                    getFlexColumn(context)
                ]
            )
        );
    }

    getFlexColumn(context) {
        return new Column(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            crossAxisAlignment: CrossAxisAlignment.end,
            children: <Widget>[
                new Container(
                    color: Colors.red,
                    height: 120.0,
                    width: 120.0,
                ),
                new Container(
                    color: Colors.green,
                    height: 120.0,
                    width: 120.0,
                )
            ],
        );
    }
}