execute @s ~ ~ ~ detect ~ ~1 ~ sand 0 loot spawn ~ ~-1 ~ loot "entities/sievesandloot2"
execute @s ~ ~ ~ detect ~ ~1 ~ sand 0 setblock ~ ~1 ~ air

execute @s ~ ~ ~ detect ~ ~1 ~ gravel 0 loot spawn ~ ~-1 ~ loot "entities/sievegravelloot2"
execute @s ~ ~ ~ detect ~ ~1 ~ gravel 0 setblock ~ ~1 ~ air