Emulate green bar line printer output using CSS

greenbar-css.less

// http://www.pdp8online.com/images/greenbar.shtml

@ws-greenbar-bg:        #e4ffc7;
@ws-greenbar-border:    #4e9a06;

table.table-greenbar {
    tr:nth-of-type(6n+1), tr:nth-of-type(6n+2), tr:nth-of-type(6n+3) {
        background: @ws-greenbar-bg;
    }
    tr {
        td, th {
            border-width: 0;
        }
    }
    tr:nth-of-type(6n+1) {
        td, th {
            border-top: 1px solid @ws-greenbar-border;
        }
    }
    tr:nth-of-type(6n+3) {
        td, th {
            border-bottom: 1px solid @ws-greenbar-border;
        }
    }
}