AlliedModders - Help zp extra item round limits

ANY BODY CAN HELP ME WITH THIS EXTRA ITEM ,THIS EXTRA ITEM IS BUYABLE ,AFTER 1 ROUND IS NOT BUYABLE AND NEXT ROUND IS BUYABLE AGAIN ..HOW CAN I ADD 3 MORE ROUNDS TO LIMIT THIS ITEM :/ .THNX ALL CODE IS HERE

PHP Code:


		
			
#include <amxmodx>   
#include <zombieplague>   
#include <fakemeta_util>   

new const g_item_name[] = { "Nemesis" }   
const g_item_cost = 50   
new count[33]   

// Item IDs   
new g_nemesis   

public plugin_init()   
{   
    register_plugin("[ZP] New Buy Nemesis", "2.0", "GPOWER")   
    register_logevent("round_start", 2, "1=Round_Start")   
    g_nemesis = zp_register_extra_item(g_item_name, g_item_cost, ZP_TEAM_HUMAN)       
    count[0] = 0;   

}   
public zp_extra_item_selected(player, itemid)   
{   
    if (itemid == g_nemesis)   
    {   
        if(zp_has_round_started())  
        {  
            client_print(player, print_chat, "[ZP] You Can't Buy Nemesis Now !")   
            return ZP_PLUGIN_HANDLED  
        }  
        else  
        {  
            if(count[0] == 0)   
            {       
                zp_make_user_nemesis(player)   
                count[0] = 1;   
            }   
            else   
            {   
                client_print(player, print_chat, "[ZP] The nemesis cant be bought 2 rounds in a row, try next round !")    
                return ZP_PLUGIN_HANDLED   
            }   
        }  
    }   
    return PLUGIN_CONTINUE   
}   
public round_start()   
{   
        if(count[0] == 1)   
        {   
            count[0] = 2;   
        }   
        else if(count[0] == 2)   
        {   
            count[0] = 0;   
        }