execute unless entity @e[tag=ng+portal,distance=..100] facing 0 ~ 0 run particle minecraft:smoke ^ ^ ^.5 ~ ~ ~ 0 0 force @s
execute if entity @e[tag=ng+portal,distance=..100] facing entity @e[tag=ng+portal,distance=..100] eyes run particle minecraft:smoke ^ ^ ^.5 ~ ~ ~ 0 0 force @s