Editing CSS

[Lionel]

Hi you there;

I know this topic has been treated before but cannot find it. I need to edit the look of a script (The one in the red circle in tha attached image) The css to use is this:

clock {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
font-weight: bold;
color: #F00;
text-align: left;
}

I need some one to tell me how to do it. The placeholder where the script is placed is named "clock"

Thanks