scoreboard players set @s KyuDummy 10
execute as @s[scores={KyuDummy=10..}] run fill ~-4 ~-4 ~-4 ~5 ~7 ~4 mossy_cobblestone_slab[type=bottom] replace stone_slab[type=bottom]
execute as @s[scores={KyuDummy=10..}] run fill ~-4 ~-4 ~-4 ~5 ~7 ~4 mossy_cobblestone_slab[type=top] replace stone_slab[type=top]
execute as @s[scores={KyuDummy=10..}] run fill ~-4 ~-4 ~-4 ~5 ~7 ~4 mossy_cobblestone_slab[type=double] replace stone_slab[type=double]