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(147,100%,40%);background-color:hsl(81,100%,50%)' scrollamount='5' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(222,100%,40%);background-color:hsl(291,100%,50%)' scrollamount='8' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(193,100%,40%);background-color:hsl(229,100%,50%)' scrollamount='1' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(123,100%,40%);background-color:hsl(241,100%,50%)' scrollamount='4' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(29,100%,40%);background-color:hsl(105,100%,50%)' scrollamount='9' direction='right' behavior='alternate'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(107,100%,40%);background-color:hsl(97,100%,50%)' scrollamount='8' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(52,100%,40%);background-color:hsl(202,100%,50%)' scrollamount='7' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(153,100%,40%);background-color:hsl(217,100%,50%)' scrollamount='8' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(258,100%,40%);background-color:hsl(209,100%,50%)' scrollamount='5' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(147,100%,40%);background-color:hsl(216,100%,50%)' scrollamount='1' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div></div><div style='height:100%;width:50%;float:left'><div class='w'><marquee style='color:hsl(39,100%,40%);background-color:hsl(29,100%,50%)' scrollamount='8' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(292,100%,40%);background-color:hsl(175,100%,50%)' scrollamount='4' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(77,100%,40%);background-color:hsl(273,100%,50%)' scrollamount='3' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(122,100%,40%);background-color:hsl(36,100%,50%)' scrollamount='2' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(62,100%,40%);background-color:hsl(144,100%,50%)' scrollamount='4' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(299,100%,40%);background-color:hsl(334,100%,50%)' scrollamount='5' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(209,100%,40%);background-color:hsl(131,100%,50%)' scrollamount='6' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(345,100%,40%);background-color:hsl(250,100%,50%)' scrollamount='6' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(69,100%,40%);background-color:hsl(285,100%,50%)' scrollamount='6' direction='right' behavior='scroll'>GOODBYE WORLD</marquee></div><div class='w'><marquee style='color:hsl(64,100%,40%);background-color:hsl(263,100%,50%)' scrollamount='5' direction='left' behavior='scroll'>GOODBYE WORLD</marquee></div></div></body></foreignObject><style>*{font-size:50px}</style></svg>)