halloween colors geometry pattern. orang purple green ornament. mosaic of neon bright squares on black

black orange purple violet green neon psychedelic square seamless optical grid magic halloween geometry ornament holiday mosaic bright background gothic dark checkered diagonal rhomb vector texture element design fresh pattern decoration hello autumn cute celebration retro shape abstract geometric tile trendy illusion effect fantasy mesh fancy diamond colorful simple modern graphic colors orang squares repeating decor thanksgiving day line font circle symmetry art screenshot text blue number flooring light toy textile pattern ornament