diff --git a/client/webgl.js b/client/webgl.js
index 8fb0dec..b975119 100644
--- a/client/webgl.js
+++ b/client/webgl.js
@@ -1,3 +1,5 @@
+// NEXT: fire events for brush changes
+
 document.addEventListener('DOMContentLoaded', main);
 
 function draw(state, context) {