Spray the dark blue 1st let it cure completely, very important. Get a glass cutting board. Lay out some delicate masking tape. Mark on the tape with a pen the flame design and the straight lines. Use a fresh sharp blade, cut it. Pull what part you want left the dark blue. Lay the tape down the clear over the tape, this seals the edge so the next color doesnt bleed through. Spray the next color let it cure completely before yoy unmask. Thats how i would do it.