execute at @s positioned ~ ~280 ~ run kill @e[type=item,distance=..3]
execute at @s[tag=!DoubleZombie] run summon zombie ~ ~ ~ {Tags:["DoubleZombie","DoubleZombieBot"],Passengers:[{Tags:["DoubleZombie","DoubleZombieTop"],id:"minecraft:zombie",IsBaby:1b}]}
execute at @s[tag=!DoubleZombie] run tp @s[tag=!DoubleZombie] ~ ~-100 ~