rendered paste body<!DOCTYPE html><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Dozenal Clock</title> <script type="text/javascript"> var a = 0; var b = 0; var c = 0; var d = 0; var e = 0; var t; function add(x) { if(x < 9) { x++; } else if(x == 9) { x = "a"; } else if(x == "a") { x = "b"; else if(x == "b") { x = 0; } return x; } function count() { document.getElementById('txt').innerHTML=a+":"+b+":"+c+":"+d+":"+e; e = add(e); if(e == 0) { d = add(d); if(d == 0) { c = add(c); if(c == 0) { b = add(b); if(b == 0) { a = add(a); }}}} t = setTimeout('count()',1000; } </script> </head><body onload="count()"><div id="txt"></div></body></html>