lj4.tmac

.nr _C \n(.C .cp 0 . . This is designed so that \[ul], \[rn], and \[br] form corners.
.fchar \[br] \Z'\v'.25m'\D'R .04m -1m'' .fchar \[ru] \Z'\v'-.02m'\D'R .54m .04m''\h'.5m' .fchar \[rn] \Z'\v'-.77m'\D'R .54m .04m''\h'.5m' .fchar \[ul] \Z'\v'.23m'\D'R .54m .04m''\h'.5m' . .cp \n[_C] . .do mso latin1.tmac