tag @s add gianthead
execute at @s positioned ~ ~2 ~ unless entity @e[tag=bighead,distance=...2] run summon item_display ~ ~2 ~ {item:{id:"minecraft:zombie_head"},Tags:[bighead,special]}
execute as @e[tag=bighead] at @s positioned ~ ~-2 ~ run data modify entity @s Rotation set from entity @e[tag=gianthead,limit=1,sort=nearest] Rotation
execute as @e[tag=bighead] run data modify entity @s transformation.scale set value [4f,4f,4f]