set trendy vertical abstract backgrounds 16x9. various s, wavy objects. contemporary modern background set

16x9 abstract abstraction advertisement advertising app artwork background backgrounds blot book booklet brush bundle calm collage collection colors contemporary copy cover creativity design doodle drawing drawn element expression figure freehand futuristic hand isolated layout media minimal mixing modern objects pastel placard postcard poster presentation scribble set shapes simple simplicity social space stock template texture trendy various vector vertical wallpaper wavy web