fh

 new StaggeredGridView.countBuilder(
                crossAxisCount: 4,
                itemCount: 6,
                itemBuilder: (BuildContext context, int index) => new Container(
                    color: Colors.green,
                    child: new Center(
                      child: new FlatButton(
                        color:  Colors.white,
                        child: new Text('$index'),
                      ),
                    )),
                staggeredTileBuilder: (int index) =>
                new StaggeredTile.count(2, index.isEven ? 2 : 1),
                mainAxisSpacing: 4.0,
                crossAxisSpacing: 4.0,
              )
            ],
          ),
        ),