body{background:linear-gradient(-45deg,rgba(20,118,215,1),rgba(229,57,53,1),rgba(251,140,0,1),rgba(67,160,71,1),rgba(171,71,188,1),rgba(236,195,31,1));background-size:400% 400%;animation:gradient 15s ease infinite}@keyframes gradient{0%{background-position:0 50%}50%{background-position:100% 50%}100%{background-position:0 50%}}