diff --git a/show/dance2018/effect/centerSpot.n3 b/show/dance2018/effect/centerSpot.n3
new file mode 100644
--- /dev/null
+++ b/show/dance2018/effect/centerSpot.n3
@@ -0,0 +1,11 @@
+@prefix : <http://light9.bigasterisk.com/> .
+@prefix dev: <http://light9.bigasterisk.com/device/> .
+@prefix effect: <http://light9.bigasterisk.com/effect/> .
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix show: <http://light9.bigasterisk.com/show/dance2018/> .
+@prefix xml: <http://www.w3.org/XML/1998/namespace> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+
+effect:centerSpots2 :value 4.72e-01 .
+effect:centerSpots3 :value 6.3e-02 .