JSFiddle - React, Tailwind, and code Playground
by fxi
HTML
<body onload='setInterval(f=e=>{for(c=n=>["俗⤕翕䡕俗","翿嬉缿䬬缿"][~~(n/5)].charCodeAt(i/40+7&7)&7<<n%5*3&1<<i%40+t+(a-=5)+n%5*3,o=i=0,[A,B,,C,D]=/\d+:\d+/.exec(Date())+o,t++,l=f+o;i++<l.length-1;a=0,o+=i%40?`<f style="background:${c(A)|c(B)|c(C)|c(D)?"#fff":`hsl(${(-t*4+i%40)%360},100%,30%)`}">${l[i]}</f>`:"\n");p.innerHTML=o},t=99)'><pre id=p>CSS
body {
background:#222;
}