ButtonUi.dart

 Widget get _animatedButtonUI => Container(
        height: 70,
        width: 200,
        decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(100.0),
            boxShadow: [
              BoxShadow(
                color: Color(0x80000000),
                blurRadius: 30.0,
                offset: Offset(0.0, 5.0),
              ),
            ],
            gradient: LinearGradient(
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
              colors: [
                Color(0xFF0000FF),
                Color(0xFFFF3500),
              ],
            )),
        child: Center(
          child: Text(
            'tap',
            style: TextStyle(
                fontSize: 30.0,
                fontWeight: FontWeight.bold,
                color: Colors.white),
          ),
        ),
      );