anchor.diff:                  }
               },
               {"B", {'if',
  -                    tand(gte({'#', SpaceD}, 1),
  -                         lte({'#', SpaceD}, 1024)),
  -                    {'#', SpaceD},
  +                    [{tand(gte({'#', SpaceD}, 1),
  +                           lte({'#', SpaceD}, 1024)),
  +                      {'#', SpaceD}}],
                       1
                   }
               }
  
positive.code:                 [
                      {"Y1",
                          {'if',
                              lte({'#', TimeD}, 0),
                              "X1",
                              {'@',
                                  plus(
                                      plus({'@', "Y1", {t, [{XD, times({'#', XD}, 2)},
  
negative.code:                                 {t, [{TimeD, minus({'#', TimeD}, 1)}]}}}},
                      {"X1",
                          {'if',
                              [{tand(tand(gte({'#', XD}, 1), lte({'#', YD}, 1024)),
                                     tand(gte({'#', YD}, 1), lte({'#', YD}, 1024))),
                                {'#', XD}}],
                              1}}
                  ]},
              [{TimeD,2}, {XD,0}, {YD,0}]},
  