how to use decoration box in flutter code example

Example 1: box decoration s flutter

Center(  child: new Container(    decoration: new BoxDecoration(      color: Colors.purple,      gradient: new LinearGradient(        colors: [Colors.red, Colors.cyan],        begin: Alignment.centerRight,        end: Alignment.centerLeft      ),    ),    child: new FlutterLogo(      size: 200.0,    )  ),);

Example 2: box decoration s flutter

new Center(  child: new Container(    decoration: new BoxDecoration(      color: Colors.purple,      gradient: new LinearGradient(        colors: [Colors.red, Colors.cyan],        begin: Alignment.centerRight,        end: new Alignment(0.8, 0.0),        tileMode: TileMode.mirror      ),    ),    child: new FlutterLogo(      size: 200.0,    )  ),);