
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1
summon silverfish ~ ~1 ~-1

playsound minecraft:entity.silverfish.ambient hostile @a[distance=..10] ~ ~ ~ 1 1 1
playsound minecraft:entity.silverfish.ambient hostile @a[distance=..10] ~ ~ ~ 1 1 1
playsound minecraft:entity.silverfish.ambient hostile @a[distance=..10] ~ ~ ~ 1 1 1
playsound minecraft:entity.silverfish.ambient hostile @a[distance=..10] ~ ~ ~ 1 1 1
playsound minecraft:entity.silverfish.ambient hostile @a[distance=..10] ~ ~ ~ 1 1 1

fill ~ ~ ~ ~ ~ ~ glass
fill ~ ~1 ~ ~ ~1 ~ glass
