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(338,100%,40%);background-color:hsl(144,100%,50%)' scrollamount='4' direction='right' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(255,100%,40%);background-color:hsl(181,100%,50%)' scrollamount='7' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(277,100%,40%);background-color:hsl(302,100%,50%)' scrollamount='3' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(212,100%,40%);background-color:hsl(209,100%,50%)' scrollamount='8' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(73,100%,40%);background-color:hsl(235,100%,50%)' scrollamount='2' direction='left' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(57,100%,40%);background-color:hsl(292,100%,50%)' scrollamount='2' direction='right' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(124,100%,40%);background-color:hsl(108,100%,50%)' scrollamount='6' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(116,100%,40%);background-color:hsl(301,100%,50%)' scrollamount='2' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(28,100%,40%);background-color:hsl(273,100%,50%)' scrollamount='2' direction='left' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(116,100%,40%);background-color:hsl(54,100%,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(111,100%,40%);background-color:hsl(91,100%,50%)' scrollamount='7' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(243,100%,40%);background-color:hsl(312,100%,50%)' scrollamount='2' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(86,100%,40%);background-color:hsl(42,100%,50%)' scrollamount='5' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(300,100%,40%);background-color:hsl(73,100%,50%)' scrollamount='7' direction='left' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(91,100%,40%);background-color:hsl(350,100%,50%)' scrollamount='5' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(22,100%,40%);background-color:hsl(179,100%,50%)' scrollamount='7' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(278,100%,40%);background-color:hsl(62,100%,50%)' scrollamount='2' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(55,100%,40%);background-color:hsl(238,100%,50%)' scrollamount='2' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(71,100%,40%);background-color:hsl(111,100%,50%)' scrollamount='6' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(253,100%,40%);background-color:hsl(247,100%,50%)' scrollamount='2' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div></div></body></foreignObject><style>*{font-size:50px}</style></svg>)