execute if block ~ ~ ~ minecraft:mossy_cobblestone_slab[type=top] run scoreboard players set @s bw_block 539
execute if block ~ ~ ~ minecraft:mossy_cobblestone_slab[type=bottom] run scoreboard players set @s bw_block 540
execute if block ~ ~ ~ minecraft:mossy_cobblestone_slab[type=double] run scoreboard players set @s bw_block 541