json sample in gallery

content/treehouse/dev/syntax-highlighting.tree

@@ -91,3 +91,44 @@
         ```
 
         note that `[^]` is not the same as `.`, because the latter omits newlines.
+
+% id = "01HRT0W4AKQJEAMJ8XHJVMY4ZV"
+- `json`
+
+    % id = "01HRT0W4AKPFENNFWMA7AAGN5Z"
+    - patterns
+    ```json
+    abcd
+    0.912392198e+2113
+    "abcd":
+    "abcd"
+    ,
+    ```
+
+    % id = "01HRT0W4AK8D1W9ZN9HJTHC85Q"
+    - keywords
+    ```json
+    null true false
+    ```
+
+    % id = "01HRT0W4AK4F2S65M1NT75PCGQ"
+    - sample
+    ```json
+    {
+        "patterns": [
+            { "regex": "[a-zA-Z_][a-zA-Z0-9_]*", "is": "error" },
+            { "regex": "[0-9]+(\\.[0-9]*([eE][-+]?[0-9]+)?)?", "is": "literal" },
+            {
+                "regex": "\"(\\\\\"|[^\"])*\"(:)",
+                "is": { "default": "keyword2", "captures": ["keyword2", "punct"] }
+            },
+            { "regex": "\"(\\\\\"|[^\"])*\"", "is": "string" },
+            { "regex": "[,]", "is": "punct" }
+        ],
+        "keywords": {
+            "null": { "into": "literal" },
+            "true": { "into": "literal" },
+            "false": { "into": "literal" }
+        }
+    }
+    ```