Goodbye World is a conceptual artwork using NFT, animated using the marquee tag, which has been deprecated in the HTML standard for web creation technology. Therefore, this is a work with an uncontrollable lifespan. It may stop working at some point. This is a derivative of the work marquee shelter by 0xhaiku.
 format('woff2');}*{padding:0;margin:0;font-size:10vh;font-weight:900;font-family:'GBW',monospace;box-sizing:border-box}.w{height:10%;width:100%;}</style><div style='height:100%;width:50%;float:left'><div class='w'><marquee style='color:hsl(226,100%,40%);background-color:hsl(240,100%,50%)' scrollamount='10' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(33,100%,40%);background-color:hsl(17,100%,50%)' scrollamount='5' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(15,100%,40%);background-color:hsl(191,100%,50%)' scrollamount='4' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(97,100%,40%);background-color:hsl(84,100%,50%)' scrollamount='6' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(188,100%,40%);background-color:hsl(310,100%,50%)' scrollamount='9' direction='right' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(136,100%,40%);background-color:hsl(308,100%,50%)' scrollamount='8' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(346,100%,40%);background-color:hsl(196,100%,50%)' scrollamount='7' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(107,100%,40%);background-color:hsl(185,100%,50%)' scrollamount='9' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(197,100%,40%);background-color:hsl(249,100%,50%)' scrollamount='9' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(66,100%,40%);background-color:hsl(89,100%,50%)' scrollamount='1' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div></div><div style='height:100%;width:50%;float:left'><div class='w'><marquee style='color:hsl(85,100%,40%);background-color:hsl(158,100%,50%)' scrollamount='1' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(101,100%,40%);background-color:hsl(51,100%,50%)' scrollamount='2' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(48,100%,40%);background-color:hsl(229,100%,50%)' scrollamount='1' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(0,100%,40%);background-color:hsl(57,100%,50%)' scrollamount='1' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(3,100%,40%);background-color:hsl(360,100%,50%)' scrollamount='6' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(270,100%,40%);background-color:hsl(244,100%,50%)' scrollamount='6' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(277,100%,40%);background-color:hsl(240,100%,50%)' scrollamount='1' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(263,100%,40%);background-color:hsl(64,100%,50%)' scrollamount='4' direction='right' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(124,100%,40%);background-color:hsl(335,100%,50%)' scrollamount='3' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(214,100%,40%);background-color:hsl(93,100%,50%)' scrollamount='7' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div></div></body></foreignObject><style>*{font-size:50px}</style></svg>)