public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
   if(newkeys == KEY_LOOK_BEHIND)
   {
	   if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
	   {
		   new idcar = GetPlayerVehicleID(playerid),string[128],sendername[25];
		   if(IsABike(idcar)) return SCM(playerid, COLOR_LIGHTGREEN3, "Nu poti folosi comanda /engine pentru biciclete.");
	  	   {
     	       if(vehEngine[idcar] == 0)
        	   {
				   vehEngine[idcar] = 1;
	               GetVehicleParamsEx(idcar,engine,lights,alarm,doors,bonnet,boot,objective);
	               SetVehicleParamsEx(idcar,VEHICLE_PARAMS_ON,lights,alarm,doors,bonnet,boot,objective);
	               new vehicle;
	               vehicle = GetVehicleModel(idcar) - 400;
	    		   GetPlayerName(playerid, sendername, sizeof(sendername));
	               SetPVarInt(playerid, "Engine", 1);
	               {
		               format(string,sizeof(string),"* %s starts the engine of his %s.",sendername,aVehicleNames[vehicle]);
		               ProxDetector(30.0, playerid, string, COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE);
				   }
        	   }
      	  	   else if(vehEngine[idcar] == 1)
        	   {
    			   vehEngine[idcar] = 0;
    			   GetVehicleParamsEx(idcar,engine,lights,alarm,doors,bonnet,boot,objective);
      	    	   SetVehicleParamsEx(idcar,VEHICLE_PARAMS_OFF,lights,alarm,doors,bonnet,boot,objective);
            	   new vehicle;
            	   vehicle = GetVehicleModel(idcar) - 400;
	        	   GetPlayerName(playerid, sendername, sizeof(sendername));
            	   SetPVarInt(playerid, "Engine", 0);
            	   {
	            	   format(string,sizeof(string),"* %s stops the engine of his %s.",sendername,aVehicleNames[vehicle]);
	            	   ProxDetector(30.0, playerid, string, COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE,COLOR_PURPLE);
				   }
        	   }
	       }
	   }
    }
    return 1;
}