Anti Spawn Kill Protection - SAMP (AliScripter)

// Includes
#include <a_samp>

// Variables
new AntiSK[MAX_PLAYERS], AntiSKt[MAX_PLAYERS], AntiSKr[MAX_PLAYERS], AntiSKa[MAX_PLAYERS];

#define FLOAT_INFINITY (0x7F800000)

public OnFilterScriptInit()
{
    return 1;
}

public OnFilterScriptExit()
{
    return 1;
}

public OnPlayerSpawn(playerid)
{
    SpawnProtect(playerid);
    return 1;
}

forward SpawnProtect(playerid);
public  SpawnProtect(playerid)
{
    SetPlayerHealth(playerid, FLOAT_INFINITY);
    AntiSKr[playerid] = random(3);
    switch(AntiSKr[playerid])
    {
        case 0:
        {
            AntiSKa[playerid] = 10*1000; // 10 multiplied by 1000 mili-secs = 10 seconds.
            SendClientMessage(playerid, -1, "* You have spawn protection for 10 seconds.");
        }
        case 1:
        {
            AntiSKa[playerid] = 15*1000; // 15 multiplied by 1000 mili-secs = 15 seconds.
            SendClientMessage(playerid, -1, "* You have spawn protection for 15 seconds.");
        }
        case 2:
        {
            AntiSKa[playerid] = 20*1000; // 20 multiplied by 1000 mili-secs = 20 seconds.
            SendClientMessage(playerid, -1, "* You have spawn protection for 20 seconds.");
        }
    }
    AntiSK[playerid] = 1;
    AntiSKt[playerid] = SetTimerEx("AntiSKfunc", AntiSKa[playerid], false, "i", playerid);
    SendClientMessage(playerid, -1, "* Press key 'N' to end spawn protection.");
    return 1;
}

forward AntiSKfunc(playerid);
public  AntiSKfunc(playerid)
{
    AntiSK[playerid] = 0;
    SetPlayerHealth(playerid, 99.0);
    SetPlayerArmour(playerid, 99.0);
    SendClientMessage(playerid, -1, "* Spawn protection ended.");
    return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys & KEY_NO && AntiSK[playerid] == 1)
    {
        KillTimer(AntiSKt[playerid]);
        AntiSKfunc(playerid);
        SendClientMessage(playerid, -1, "* You have ended your spawn protection.");
    }
    return 1;
}