Test various uses of 'tag the line'. sdr> /program=Program.PLUS; setFormation(Formation.SQUARED_SET) | 3Gv 3Bv | | 4B> 2G< | | 4G> 2B< | | 1B^ 1G^ sdr> heads lead right ; step to a wave | 4B> 1B> | | 3G< 2G< | | 4G> 1G> | | 3B< 2B< sdr> half tag | 4G^ 4Bv 1G^ 1Bv | | 3B^ 3Gv 2B^ 2Gv sdr> left half tag | 1G< 1B< | | 4G> 4B> | | 2B< 2G< | | 3B> 3G> sdr> tag the line | 2B^ 2G^ | | 3B^ 3G^ | | 1Gv 1Bv | | 4Gv 4Bv sdr> do half of a tag the line * Can't divide indivisible part sdr> /exit