update index

index.html

@@ -46,10 +46,10 @@
     <script type="text/javascript" src="stitchcode/symbols.js?version=2021-12-14"></script>
     <script type="text/javascript" src="stitchcode/blocks.js?version=2021-12-14"></script>
     <script type="text/javascript" src="stitchcode/threads.js?version=2022-12-05"></script>
-    <script type="text/javascript" src="stitchcode/objects.js?version=2023-02-14"></script>
+    <script type="text/javascript" src="stitchcode/objects.js?version=2023-02-20"></script>
     <script type="text/javascript" src="stitchcode/turtlecloud.js?version=2022-10-05"></script>
     <script type="text/javascript" src="stitchcode/gui.js?version=2022-10-31"></script>
-    <script type="text/javascript" src="stitchcode/store.js?version=2022-06-14"></script>
+    <script type="text/javascript" src="stitchcode/store.js?version=2022-06-14"></script
 
     <script type="text/javascript">
       var world;

stitchcode/objects.js

@@ -1254,7 +1254,7 @@ SpriteMorph.prototype.setColor = function (aColor) {
 
 
 SpriteMorph.prototype.setColorRGB = function (r,g,b) {
-  if (!isFinite(a) || !isFinite(b) || !isFinite(c)) {
+  if (!isFinite(r) || !isFinite(b) || !isFinite(g)) {
     throw new Error('value must not by Infinity');
   }
 	var a = this.color.a;