script funktioniert nicht wie es soll

Hi leute dieses script soll am bsn eine explosionskette auslösen die 4 min. dauer doch es gibt nur 1 große explosion .
was mache ich falsch.
ach ja könnte jemand so nett sein und die werte (timerzeit) ausbessern?
ths im vorraus.
(!!!!!ES IST DRINGEND!!!!!!)

#include <a_samp>

#if defined FILTERSCRIPT

public OnFilterScriptInit()
{
print("\n--------------------------------------");
print(" Firemans");
print("--------------------------------------\n");
return 1;
}

public OnFilterScriptExit()
{
return 1;
}

#else

main()
{
print("\n----------------------------------");
print(" Fire in the Hand");
print("----------------------------------\n");
}

#endif

public OnGameModeInit()
{

SetGameModeText("Blank Script");
AddPlayerClass(0, 1958.3783, 1343.1572, 15.3746, 269.1425, 0, 0, 0, 0, 0, 0);
SetTimer("feuer", 20000, 0);
return 1;

}

public OnGameModeExit()
{
return 1;
}

public OnPlayerRequestClass(playerid, classid)
{
SetPlayerPos(playerid, 1228.8367,-918.9136,42.4397);
SetPlayerCameraPos(playerid, 1958.3783, 1343.1572, 15.3746);
SetPlayerCameraLookAt(playerid, 1958.3783, 1343.1572, 15.3746);
AddStaticVehicle(407,1180.9076,-933.4490,43.2847,98.8701,3,1); // firetruck
return 1;
}

public OnPlayerConnect(playerid)
{
return 1;
}

public OnPlayerDisconnect(playerid, reason)
{
return 1;
}

public OnPlayerSpawn(playerid)
{
return 1;
}

public OnPlayerDeath(playerid, killerid, reason)
{
return 1;
}

public OnVehicleSpawn(vehicleid)
{
return 1;
}

public OnVehicleDeath(vehicleid, killerid)
{
return 1;
}

public OnPlayerText(playerid, text[])
{
return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
if(strcmp(cmdtext,"/bsn",true)==0)
{
SetPlayerPos(playerid,1228.8367,-918.9136,42.4397);
SendClientMessage(playerid,0x006A00FF,"Du wurdest Teleportiert");
}

if(strcmp(cmdtext,"/fire",true)==0)
{
SetTimer("feuer", 20000, 0);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
CreateExplosion(1219.6091,-923.4299,44.0000,1,179.5417);
SendClientMessage(playerid,0x006A00FF,"Ein feuer ist ausgebrochen");

}

return 1;
}

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
return 1;
}

public OnPlayerExitVehicle(playerid, vehicleid)
{
return 1;
}

public OnPlayerStateChange(playerid, newstate, oldstate)
{
return 1;
}

public OnPlayerEnterCheckpoint(playerid)
{
return 1;
}

public OnPlayerLeaveCheckpoint(playerid)
{
return 1;
}

public OnPlayerEnterRaceCheckpoint(playerid)
{
return 1;
}

public OnPlayerLeaveRaceCheckpoint(playerid)
{
return 1;
}

public OnRconCommand(cmd[])
{
return 1;
}

public OnPlayerRequestSpawn(playerid)
{
return 1;
}

public OnObjectMoved(objectid)
{
return 1;
}

public OnPlayerObjectMoved(playerid, objectid)
{
return 1;
}

public OnPlayerPickUpPickup(playerid, pickupid)
{
return 1;
}

public OnVehicleMod(playerid, vehicleid, componentid)
{
return 1;
}

public OnVehiclePaintjob(playerid, vehicleid, paintjobid)
{
return 1;
}

public OnVehicleRespray(playerid, vehicleid, color1, color2)
{
return 1;
}

public OnPlayerSelectedMenuRow(playerid, row)
{
return 1;
}

public OnPlayerExitedMenu(playerid)
{
return 1;
}

public OnPlayerInteriorChange(playerid, newinteriorid, oldinteriorid)
{
return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
return 1;
}

public OnRconLoginAttempt(ip[], password[], success)
{
return 1;
}

public OnPlayerUpdate(playerid)
{
return 1;
}

public OnPlayerStreamIn(playerid, forplayerid)
{
return 1;
}

public OnPlayerStreamOut(playerid, forplayerid)
{
return 1;
}

public OnVehicleStreamIn(vehicleid, forplayerid)
{
return 1;
}

public OnVehicleStreamOut(vehicleid, forplayerid)
{
return 1;
}

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
return 1;
}

public OnPlayerClickPlayer(playerid, clickedplayerid, source)
{
return 1;
}