canvas{position:fixed;top:0;left:0;overflow:hidden}html{overflow:hidden}.oldMonitor{z-index:1;opacity:60%}.filter{background:linear-gradient(to top,#000,#000,#333,#333);background-size:cover;background-size:1000% 1px;z-index:-1}@media screen{.filter{animation:scanlines infinite 55s linear}}@keyframes scanlines{0%{background-position:0 0}to{background-position:0 -10px}}