@Composable
fun Board() {
    Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.BottomCenter) {
        LazyVerticalGrid(
            cells = GridCells.Fixed(7),
            contentPadding = PaddingValues(7.dp),
        ) {
            items(49) { index ->
                Piece(index)
            }
        }
    }
}