WeekOne

import 'package:flutter/material.dart';

main() {
  runApp(MaterialApp(
    home: Scaffold(
      body: ShapeWidget(),
    ),
  ));
}

class ShapeWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return _ShapeWidgetState();
  }
}

class _ShapeWidgetState extends State<ShapeWidget> {
  var containerOneColor = Colors.blue;
  @override
  Widget build(BuildContext context) {
    return Container(
        child: Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: <Widget>[
        Row(
          children: <Widget>[
            Expanded(
                child: GestureDetector(
                  onTap: (){
                    setState(() {
                      containerOneColor = Colors.yellow;
                    });
                  },
                  child: Container(
              height: 100.0,
              width: 100.0,
              color: containerOneColor,
            ),
                )),
            Expanded(
                child: Container(
              height: 100.0,
              width: 100.0,
              color: Colors.tealAccent,
            )),
            Expanded(
                child: Container(
                    height: 100.0, width: 100.0, color: Colors.indigo))
          ],
        ),
        Expanded(
            child: Container(
          height: 100.0,
          width: 100.0,
          color: Colors.black,
        )),
        Row(
          children: <Widget>[
            Expanded(
                child: Container(
              height: 100.0,
              width: 100.0,
              color: Colors.red,
            )),
            Expanded(
                child: Container(
              height: 100.0,
              width: 100.0,
              color: Colors.blue,
            )),
            Expanded(
                child: Container(
              height: 100.0,
              width: 100.0,
              color: Colors.green,
            ))
          ],
        ),
      ],
    ));
  }
}