#visualization{background-color:#fff}.icon21{height:21px;width:21px;background-image:url("/blockly/media/turtle/icons.png")}.code{background-position:-42px 0px}.link{background-position:-21px 0px}.run{background-position:-63px -21px;margin-right:3px}.stop{background-position:-63px 0px;margin-right:3px}#answer{opacity:0.2}