Help! Rainbow usernames

Hey, I found this,
CODE:
a[href="/u14"] span{color:#F00;animation:svcolor 1s infinite;-moz-animation:svcolor 1s infinite;-webkit-animation:svcolor 1s infinite;}
@keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}
@-moz-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}
@-webkit-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}

on a site, and it broke my css, what's wrong with it?

Please don't use bold or color and keep to the default text. This is reserved for the staff for moderation.

How did it break your CSS?

Fuyu wrote:Hey, I found this,
CODE:
a[href="/u14"] span{color:#F00;animation:svcolor 1s infinite;-moz-animation:svcolor 1s infinite;-webkit-animation:svcolor 1s infinite;}
@keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}
@-moz-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}
@-webkit-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}}

on a site, and it broke my css, what's wrong with it?

your code is broke as you have closed tags in more then one place see here
color:#F0F}}

it should only have one like this
color:#F0F}

remove that code and add this one

Code:

a[href="/u14"] span{color:#F00;animation:svcolor 1s infinite;-moz-animation:svcolor 1s infinite;-webkit-animation:svcolor 1s infinite;}
            @keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}
            @-moz-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}
            @-webkit-keyframes svcolor{10%{color:#F00}20%{color:#F80}30%{color:#FF0}40%{color:#5F0}50%{color:#0F0}60%{color:#0FD}70%{color:#09F}80%{color:#00F}90%{color:#A0F}100%{color:#F0F}