silhouetted night city on skyline. 80s retro sci-fi background. futuristic in 80s style.

1980 80s 90s abstract backdrop background banner blue bright building city cityscape computer dark design digital future futuristic game geometric graphic grid horizon illustration landscape laser light line neon night old pink poster purple rave retro scifi shiny silhouette silhouetted sky skyline skyscraper star style technology town trendy vector vintage virtual wave