execute if block ~ ~ ~ minecraft:dark_prismarine_slab[type=top] run scoreboard players set @s bw_block 575
execute if block ~ ~ ~ minecraft:dark_prismarine_slab[type=bottom] run scoreboard players set @s bw_block 576
execute if block ~ ~ ~ minecraft:dark_prismarine_slab[type=double] run scoreboard players set @s bw_block 577