Update grid.json

grid.json

@@ -295,6 +295,17 @@
                 5
             ],
             "color": "#898989"
+        },
+        {
+            "start": [
+                11,
+                5
+            ],
+            "end": [
+                11,
+                5
+            ],
+            "color": "#898989"
         }
     ]
 }