Default Pls help me on s4 copy mt6572

Pls help me on s4 copy mt6572.......I was bricked my phone it is not booting up when i tried a custom rom on that device through mtk tools. now it is only a black screen and continue restarting.NOT EVEN START IN RECOVERY MODE JUST A BLACK SCREEN APPEARS AND RESTARTING IN A LOOP..........pls help me on this.