chore(demo): revert demo to show config options

Author: Les Moffat

demos/07-spacebox.html

@@ -60,11 +60,11 @@
       },
       halo: {
         scale: 1,
-        // stops: [
-        //   [0.0, "transparent"],
-        //   [0.2, "skyblue"],
-        //   [0.3, "transparent"]
-        // ],
+        stops: [
+          [0.0, "transparent"],
+          [0.2, "skyblue"],
+          [0.3, "transparent"]
+        ],
       }
     });