<Shelf>
{Array.from(Array(25))
.map((_, i) => [300, 250, 200, 333, 400][i % 5])
.map((height, j) => (
<Box
key={j}
width={300}
height={height}
bg="black10"
border="1px solid"
borderColor="black30"
p={1}
display="flex"
alignItems="center"
justifyContent="center"
>
<Text variant="sm-display">{j + 1}</Text>
</Box>
))}
</Shelf>