3 colume Templates - 2 new

I edit my HTML code i am planed to add a colume on rightside. but add
a page element come under leftside colume.i add on like this

#main-wrapper {
width: 470px;
float: $endSide;
word-wrap: break-word; /* fix for long text breaking sidebar float
in IE */
overflow: hidden; /* fix for long non-text content breaking IE
sidebar float */

}

#sidebar-wrapper {
width: 200px;
float: $startSide;
word-wrap: break-word; /* fix for long text breaking sidebar float
in IE */
overflow: hidden; /* fix for long non-text content breaking IE
sidebar float */

}

#sidebar-wrapperL {
width: 200px;
float: $endSide;
background:#FFFFFF;
word-wrap: break-word; /* fix for long text breaking sidebar float
in IE */
overflow: hidden; /* fix for long non-text content breaking IE
sidebar float */

}

anybody help me how to change it on rightside.