// First, you need to run the function wherever you want (like in another function when a player buys something or picks something up) and you can do that with:

    player item_hud_create("NAME_OF_TEXTURE");

// then just put the rest at the bottom of your script:

item_hud_create(item_texture)
{
        shader = item_texture;
        self.item_hud = create_simple_hud( self );
        self.item_hud.foreground = true; 
        self.item_hud.sort = 2; 
        self.item_hud.hidewheninmenu = false; 
        self.item_hud.alignX = "center"; 
        self.item_hud.alignY = "bottom";
        self.item_hud.horzAlign = "right"; 
        self.item_hud.vertAlign = "bottom";
        self.item_hud.x = -230;
        self.item_hud.y = -1; 
        self.item_hud.alpha = 1;
        self.item_hudSetShader( shader, 32, 32 );

        self thread item_hud_remove();
}

item_hud_remove()
{
    level waittill_any( "end_game", "PUT_OTHER_NOTIFY_HERE_IF_U_WANT" );
    
    self.item_hud destroy_hud();
    self.item_hud = undefined;

}

r_fullscreen 0;vid_xpos 0;vid_ypos 0;r_noborder 1;vid_restart

    level thread level_start_vox();

level_start_vox()
{
    wait( 5 );
    
    players = get_players(); 

    for( i = 0; i < players.size; i++ )
    {
        players[i].has_talked = 0;
        
        for(;;)
        {
            zombies = getaiarray("axis" );
            close_zombies = get_array_of_closest( players[i].origin, zombies, undefined, undefined, 600 );
            
            for( j = 0; j < zombies.size; j++ )
            {
                if ( (players[i] IsLookingAt(zombies[j]) || close_zombies.size > 0 || players[i].score_total > 500) && players[i].has_talked == 0 )
                {
                    players[i].has_talked = 1;
                    index = maps\_zombiemode_weapons::get_player_index( players[i] );
                    plr = "plr_" + index + "_";
                    players[i] thread create_and_play_dialog( plr, "vox_level_start", 0.25 );
                    break;
                }
                else
                {
                    wait(0.1);
                    continue;
                }
            }
            if(players[i].has_talked == 1)
            {
                break;
            }
            wait(0.05);
        }
    }
}