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abstract abstraction arcs art artificial artistic backdrop background beautiful bkg blend blue blur book brochure calm cell cellphone circles circular computer conceptual cover creative curves dark deep design desktop digital elegant empty fine fractal generated gentle gradient hue illustration internet layout leaflet light marketing math mobile modern overlap overlapping pamphlet pattern peaceful phone presentation print product professional render resource round scales sea serene serenity shading shell simple space stylized tablet technology template text twisted wallpaper waves white www