thanks to all , actually i bought a second hand(kinda rough) back light from bilal gunj , made it open by myself thas why i damaged its white stripe thinge lolz, measured the size of upper half n sketched the measured design on paper, went to a guy who makes led sign board n discussed the design after a day he made that led stripe n fortunately it fixed like its made for back light closed the light n u can see the result, now im planning to buy new back light to finally install those on my car