Test some basic calls, including "first couple go left" and
"reverse single file promenade", and "dive thru".

sdr> /program = Program.MAINSTREAM // for tag the line
MAINSTREAM
sdr> heads square thru
| 4B>  3G<  3B>  2G<
| 
| 4G>  1B<  1G>  2B<
sdr> touch
| 4B>  3B>
| 
| 3G<  2G<
| 
| 4G>  1G>
| 
| 1B<  2B<
sdr> tag the line
| 4G^  1G^
| 
| 1B^  2B^
| 
| 4Bv  3Bv
| 
| 3Gv  2Gv
sdr> do half of a zoom
| 4Gv  1B^  2B^  1Gv
| 
| 3G^  4Bv  3Bv  2G^
sdr> tag the line
| 2B<  1G<  4G>  1B>
| 
| 3B<  2G<  3G>  4B>
sdr> first couple go left next couple go right
| 2G>  4B<
| 
| 1G>  1B<
| 
| 3B>  3G<
| 
| 2B>  4G<
sdr> touch 1/4
| 4B^  2Gv
| 
| 1B^  1Gv
| 
| 3G^  3Bv
| 
| 4G^  2Bv
sdr> zoom
| 1B^  1Gv
| 
| 4B^  2Gv
| 
| 4G^  2Bv
| 
| 3G^  3Bv
sdr> centers circulate
| 1B^  1Gv
| 
| 4G^  4Bv
| 
| 2B^  2Gv
| 
| 3G^  3Bv
sdr> /// same thing:
sdr> centers box circulate
| 1B^  1Gv
| 
| 2B^  4Gv
| 
| 2G^  4Bv
| 
| 3G^  3Bv
sdr> centers zoom
| 1B^  1Gv
| 
| 2G^  4Bv
| 
| 2B^  4Gv
| 
| 3G^  3Bv
sdr> single file circulate
| 2G^  1Bv
| 
| 2B^  1Gv
| 
| 3G^  4Bv
| 
| 3B^  4Gv
sdr> zoom
| 2B^  1Gv
| 
| 2G^  1Bv
| 
| 3B^  4Gv
| 
| 3G^  4Bv
sdr> reverse single file promenade home
|      3Gv  3Bv
| 
| 4B>            2G<
| 
| 4G>            2B<
| 
|      1B^  1G^
sdr> /// we're home!
sdr> /program = Program.PLUS // for 'track 2'
PLUS
sdr> heads lead right
| 4B>  3G<  1B>  2G<
| 
| 4G>  3B<  1G>  2B<
sdr> dive thru
| 3B>  4B>  2G<  1G<
| 
| 3G>  4G>  2B<  1B<
sdr> double pass thru
| 2G<  1G<  3B>  4B>
| 
| 2B<  1B<  3G>  4G>
sdr> track 2
| 1B>  2B>
| 
| 4G<  3G<
| 
| 1G>  2G>
| 
| 4B<  3B<
sdr> swing thru
| 4G>  3G>
| 
| 4B<  3B<
| 
| 1B>  2B>
| 
| 1G<  2G<
sdr> /resolveStep
Right and Left Grand
sdr> right and left grand
|      2BL       1GQ
| 
| 2G7                 1B`
| 
| 
| 
| 3BQ                 4GL
| 
|      3G`       4B7
sdr> promenade home
|      3Gv  3Bv
| 
| 4B>            2G<
| 
| 4G>            2B<
| 
|      1B^  1G^
sdr> /exit