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Draw a pencil line with a level to mark where the stripes will be. Tape off the area that will remain the existing wall color with blue 2" painter's tape. Seal tape with varnish (basic water based) to stop bleeding, to stop pulling paint from wall and to make a clean edge.
Roll on black paint (color: BM 2133-10 Onyx ). Slowly peel tape after wall color has dried. Touch up any bleed-through with wall color and a roller sponge; keep a perfect line by putting a small piece of painter's tape on the darker color where you are touching up.
Take off old knobs; paint new ones with Safety Red spray enamel.
Lightly sand the backsplash so paint will stick. Paint the backsplash with two coats of Carrington Beige. Attach the new knobs.