CSS
#circle {
width: 122px;
height: 122px;
background:
-webkit-linear-gradient(0deg, transparent 45%, red 45%, red 55%, transparent 55%),
-webkit-linear-gradient(30deg, transparent 46%, red 46%, red 54%, transparent 54%),
-webkit-linear-gradient(60deg, transparent 46%, red 46%, red 54%, transparent 54%),
-webkit-linear-gradient(90deg, transparent 45%, red 45%, red 55%, transparent 55%),
-webkit-linear-gradient(120deg, transparent 46%, red 46%, red 54%, transparent 54%),
-webkit-linear-gradient(150deg, transparent 46%, red 46%, red 54%, transparent 54%);
background:
-moz-linear-gradient(0deg, transparent 45%, red 45%, red 55%, transparent 55%),
-moz-linear-gradient(30deg, transparent 46%, red 46%, red 54%, transparent 54%),
-moz-linear-gradient(60deg, transparent 46%, red 46%, red 54%, transparent 54%),
-moz-linear-gradient(90deg, transparent 45%, red 45%, red 55%, transparent 55%),
-moz-linear-gradient(120deg, transparent 46%, red 46%, red 54%, transparent 54%),
-moz-linear-gradient(150deg, transparent 46%, red 46%, red 54%, transparent 54%);
background:
-o-linear-gradient(0deg, transparent 45%, red 45%, red 55%, transparent 55%),
-o-linear-gradient(30deg, transparent 46%, red 46%, red 54%, transparent 54%),
-o-linear-gradient(60deg, transparent 46%, red 46%, red 54%, transparent 54%),
-o-linear-gradient(90deg, transparent 45%, red 45%, red 55%, transparent 55%),
-o-linear-gradient(120deg, transparent 46%, red 46%, red 54%, transparent 54%),
-o-linear-gradient(150deg, transparent 46%, red 46%, red 54%, transparent 54%);
background:
linear-gradient(0deg, transparent 45%, red 45%, red 55%, transparent 55%),
linear-gradient(30deg, transparent 46%, red 46%, red 54%, transparent 54%),
linear-gradient(60deg, transparent 46%, red 46%, red 54%, transparent 54%),
...