プレイヤーがスニークしているように見せたい

command /sneak <player>:
    trigger:
        set {_packet} to new play_client_entity_action packet
        set field 0 of {_packet} to id of player
        set field 1 of {_packet} to "PRESS_SHIFT_KEY"
        set field 2 of {_packet} to 0
        send arg-1 packet {_packet}

command /sneak <player>:
    trigger:
        set {_packet} to new play_client_entity_action packet
        set field 0 of {_packet} to id of player
        set field 1 of {_packet} to "PRESS_SHIFT_KEY"
        set field 2 of {_packet} to 0
        send arg-1 packet {_packet}

on packet event play_client_entity_action:
    if "%field 1 of event-packet%" is "RELEASE_SHIFT_KEY":
        cancel event

on packet event play_client_entity_action:
    if "%field 1 of event-packet%" is "RELEASE_SHIFT_KEY":
        cancel event