import 'package:flutter/material.dart';

​

class GradientBox extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return Container(

      decoration: BoxDecoration(

        gradient: LinearGradient(

          begin: Alignment.topCenter,

          end: Alignment.bottomCenter,

          colors: <Color>[

            Colors.blue,

            Colors.red,

          ],

        ),

      ),

    );

  }

}

​

// Usage:

// Replace the contents of your widget's build method with the following:

// return Scaffold(

//   body: GradientBox(),

// );