if ( section[ 0 ] === section[ 1 ] && section[ 1 ] === section[ 2 ] && section[ 2 ] === section[ 3 ] ) {
                        section = [ section[ 0 ] ];
                    }
                    // '3px 2px 3px 2px' => '3px 2px'
                    else if ( section [ 0 ] === section[ 2 ] && section[ 1 ] === section[ 3 ] ) {