_buildButtons.dart

  Widget _buildButtons() {
    return Padding(
      padding: const EdgeInsets.only(bottom: 40.0),
      child: new Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: <Widget>[
          FlatButton(
            onPressed: () {},
            child: Text(
              'Log In',
              style: TextStyle(color: Colors.white),
            ),
          ),
          FlatButton(
            onPressed: () {},
            child: Text(
              'Sign Up',
              style: TextStyle(color: Colors.white),
            ),
          ),
        ],
      ),
    );
  }