simmer effect with gidview

shimmer.dart

 GridView.builder(
      itemCount: 8,
      gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 2,
        mainAxisSpacing: 4,
        crossAxisSpacing: 4,
      ),
      itemBuilder: (context, index) {
        return Shimmer.fromColors(
          baseColor: Colors.grey.shade200,
          highlightColor: Colors.white,
          child: Container(
            decoration: BoxDecoration(
                border: Border.all(width: 1.0),
                borderRadius: BorderRadius.circular(12.0)),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                for (int i = 0; i < 5; i++)
                  Padding(
                    padding: const EdgeInsets.all(8.0),
                    child: LayoutBuilder(builder: (context, constraints) {
                      return Container(
                        width: constraints.maxWidth * (0.5 * (5 - i)),
                        height: 16,
                        decoration: BoxDecoration(
                          color: Colors.grey.shade50,
                          borderRadius: BorderRadius.circular(6.0),
                        ),
                      );
                    }),
                  )
              ],
            ),
          ),
        );
      },
    );