GUI -- Clean up local test events.

Change-Id: I112ccb2db65a8190ff03c274717abf9735084e81
diff --git a/web/gui/src/main/webapp/json/ev/traffic/scenario.json b/web/gui/src/main/webapp/json/ev/traffic/scenario.json
index 06f9bf8..9eb9a69 100644
--- a/web/gui/src/main/webapp/json/ev/traffic/scenario.json
+++ b/web/gui/src/main/webapp/json/ev/traffic/scenario.json
@@ -9,8 +9,9 @@
   "description": [
     "Figure out primary, secondary and animated link visualizations.",
     "",
-    "Press 'S' to load initial events.",
+    "Press 'H' to show hosts.",
     "",
-    "Press spacebar to complete the scenario..."
+    "Press '=' to load initial events.",
+    "Press '-' to fire further events."
   ]
 }