abstract art geometric background with vertical lines and hexagones. optical illusion with lines and transition. black lines on a

abstract art backdrop background bar code black business concept cover decorative design element fabric futuristic geometric geometrical graphic grey grid halftone hexagon hexagonal illusion industrial line linear lines metal monochrome paper parallel pattern print repeat retro simple striped stripes structure system template textile texture textured vector vertical wall wallpaper white hexagones optical transition side hexagones transition side eps10