Flutter-crypto-wallet-04.dart

class CryptoWallet extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SingleChildScrollView(
        child: Stack(
          children: <Widget>[
                        Column(
              children: <Widget>[
                Container(
                  decoration: BoxDecoration(
                    gradient: LinearGradient(
                      colors: [
                        const Color(0xFF81269D),
                        const Color(0xFFEE112D)
                      ],
                      begin: Alignment.centerLeft,
                      end: Alignment.centerRight,
                      // stops: [0.0, 0.1],
                    ),
                  ),
                  height: MediaQuery.of(context).size.height * .40,
                  padding: EdgeInsets.only(top: 55, left: 20, right: 20),
                ),
                Container(
                  height: MediaQuery.of(context).size.height * .75,
                  color: Colors.grey,
                )
              ],
            ),
          ],
        ),
      ),
    );
  }
}