card.dart

Widget buildCard(String message) {
  return Card(
    color: Colors.white70,
    child: Container(
      padding: EdgeInsets.all(10.0),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          Text(message,
              style: new TextStyle(
                fontSize: 20.0,
                fontWeight: FontWeight.bold,
              )),
          Icon(
            Icons.favorite,
            color: Colors.redAccent,
            size: 50.0,
          )
        ],
      ),
    ),
  );
}