Skript - Armorstand head rotation with loops

[S40dYk (Skripter)]

Hello guys, I'm having a problem with my script of granade csgo, and I'm creating a way for grenades to spin like they were thrown, and I used the technique of an invisible armorstand with a head item, and tried to make armorstand head to move in each loop, but it's not working.

Can anyone help me?

on right click with potato:
    set {loc} to player's location
    spawn an armor stand at {loc}
    set {_entity} to last spawned armor stand
    {_entity}.setCollidable(false)
    add "{NoGravity:1}" to nbt of {_entity}
    add "{Invisible:1}" to nbt of {_entity}
  
    push {_entity} upwards at speed 1
    push {_entity} in direction of player at speed 5
    wait 1 tick
    remove 1 potato from player
    play raw sound "mob.villager.idle1" at player with pitch 1 volume 1.0
    set helmet item of {_entity} to potato
    add "{NoGravity:0}" to nbt of {_entity}
  
    set {_angle} to {_entity}.getHeadPose()
  
    loop 60 times:
        wait 5 tick
        {_angle}.add(10, 10, 0)
      
        {_entity}.setHeadPose({_angle})