abstract background blue blue background blue lines blue waves curved lines curves dessin plastic structure style surface texture wave waves wavy wavy line wavy texture boat green line lines ship textures aircraft airplane cross flying sky smoke steam cloud lined mysterious odd strange unusual white design graphic grey stripes aqua electric blue fractal art organism pattern technology boats color colorful fishing lobster maritime markers orange summer traps yellow calm calming discrete h20 horisontal ripple ripples shape tranquil tranquillity wallpaper diagonal traquil