diff --git a/show/dance2011/subterms/song15.n3 b/show/dance2011/subterms/song15.n3
--- a/show/dance2011/subterms/song15.n3
+++ b/show/dance2011/subterms/song15.n3
@@ -1,35 +1,55 @@
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://light9.bigasterisk.com/expression> "centerpool(t)".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://www.w3.org/2000/01/rdf-schema#label> "centerpool".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/centerpool>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://light9.bigasterisk.com/expression> "bow(t)".
 <http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://www.w3.org/2000/01/rdf-schema#label> "bow".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
 <http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/bow>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://light9.bigasterisk.com/expression> "blacklight(t)".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://www.w3.org/2000/01/rdf-schema#label> "blacklight".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/blacklight>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://light9.bigasterisk.com/expression> "song15dim(t)".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://www.w3.org/2000/01/rdf-schema#label> "song15dim".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/song15dim>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://light9.bigasterisk.com/expression> "blacklight(t)*.38".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://www.w3.org/2000/01/rdf-schema#label> "green".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/green>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://light9.bigasterisk.com/expression> "strobe1(t) * chan(\"strobebright\") + chan(\"strobespeed\")*.99".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://www.w3.org/2000/01/rdf-schema#label> "strobe1".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/strobe1>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://light9.bigasterisk.com/expression> "song15(t)".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://www.w3.org/2000/01/rdf-schema#label> "song15".
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
-<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/song15>.
-<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://light9.bigasterisk.com/expression> "bow(t)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/stack1> <http://www.w3.org/2000/01/rdf-schema#label> "stack1".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/stack1> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/stack1>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/stack1> <http://light9.bigasterisk.com/expression> "stack(st(t), names=list(reversed(fronts)))*chasescoop(t)*4".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/stack1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasescoop> <http://www.w3.org/2000/01/rdf-schema#label> "chasescoop".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasescoop> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/chasescoop>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasescoop> <http://light9.bigasterisk.com/expression> "chasescoop(t)*chase(t, names=scoop, ontime=.4, offset=-.2)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasescoop> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/stack1>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasescoop>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasecolor>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/blackextras>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight>.
 <http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15>.
 <http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim>.
 <http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/green>.
 <http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1>.
-<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight>.
-<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/bow>.
+<http://light9.bigasterisk.com/show/dance2011/song15> <http://light9.bigasterisk.com/subterm> <http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blackextras> <http://www.w3.org/2000/01/rdf-schema#label> "blackextras".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blackextras> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/blackextras>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blackextras> <http://light9.bigasterisk.com/expression> "blacklight(t)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blackextras> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://www.w3.org/2000/01/rdf-schema#label> "blacklight".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/blacklight>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://light9.bigasterisk.com/expression> "blacklight(t)>0".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/blacklight> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasecolor> <http://www.w3.org/2000/01/rdf-schema#label> "chasecolor".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasecolor> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/chasecolor>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasecolor> <http://light9.bigasterisk.com/expression> "chasecolor(t)*(chase(t, names=colors, ontime=.2, offset=0)+chase(t, names=back, ontime=.2, offset=0))".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/chasecolor> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://www.w3.org/2000/01/rdf-schema#label> "song15".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/song15>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://light9.bigasterisk.com/expression> "song15(t)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://www.w3.org/2000/01/rdf-schema#label> "song15dim".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/song15dim>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://light9.bigasterisk.com/expression> "song15dim(t)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/song15dim> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://www.w3.org/2000/01/rdf-schema#label> "green".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/green>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://light9.bigasterisk.com/expression> "blacklight(t)*.38".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/green> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://www.w3.org/2000/01/rdf-schema#label> "strobe1".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/strobe1>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://light9.bigasterisk.com/expression> "strobe1(t) * chan(\"strobebright\") + chan(\"strobespeed\")*.965".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/strobe1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://www.w3.org/2000/01/rdf-schema#label> "centerpool".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://light9.bigasterisk.com/sub> <http://light9.bigasterisk.com/sub/centerpool>.
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://light9.bigasterisk.com/expression> "centerpool(t)".
+<http://light9.bigasterisk.com/show/dance2011/song15/subterm/centerpool> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://light9.bigasterisk.com/Subterm>.