diff --git a/example.json b/example.json
index 718a9d9..8297850 100644
--- a/example.json
+++ b/example.json
@@ -1,4 +1,6 @@
-{
+[
+  {
+    "name": "root",
     "nodes": [
       {
         "uniq_id": "uniq_id_12",
@@ -111,5 +113,6 @@
         }
       }
     ],
-    "node_counter": 15
-  }
\ No newline at end of file
+    "serial_number": 15
+  }
+]
\ No newline at end of file
diff --git a/lottery.json b/lottery.json
index d28e484..88bc087 100644
--- a/lottery.json
+++ b/lottery.json
@@ -1,4 +1,6 @@
-{
+[
+  {
+    "name": "root",
     "nodes": [
       {
         "uniq_id": "uniq_id_1",
@@ -92,5 +94,6 @@
         }
       }
     ],
-    "node_counter": 7
-  }
\ No newline at end of file
+    "serial_number": 7
+  }
+]
\ No newline at end of file
diff --git a/save_file.json b/save_file.json
index 765a4b1..52984e5 100644
--- a/save_file.json
+++ b/save_file.json
@@ -1,4 +1,6 @@
-{
+[
+  {
+    "name": "root",
     "nodes": [
       {
         "uniq_id": "uniq_id_1",
@@ -73,5 +75,6 @@
         }
       }
     ],
-    "node_counter": 5
-  }
\ No newline at end of file
+    "serial_number": 5
+  }
+]
\ No newline at end of file
diff --git a/subgraph.json b/subgraph.json
new file mode 100644
index 0000000..d698292
--- /dev/null
+++ b/subgraph.json
@@ -0,0 +1,86 @@
+[
+  {
+    "name": "root",
+    "nodes": [
+      {
+        "uniq_id": "1",
+        "type": "START",
+        "name": "Node 1",
+        "description": "",
+        "tool": "",
+        "nexts": [
+          "2"
+        ],
+        "true_next": null,
+        "false_next": null,
+        "ext": {
+          "pos_x": 233,
+          "pos_y": 134,
+          "width": 150,
+          "height": 200,
+          "info": null
+        }
+      },
+      {
+        "uniq_id": "2",
+        "type": "SUBGRAPH",
+        "name": "buy dog",
+        "description": "",
+        "tool": "",
+        "nexts": [],
+        "true_next": null,
+        "false_next": null,
+        "ext": {
+          "pos_x": 629,
+          "pos_y": 193,
+          "width": 150,
+          "height": 200,
+          "info": null
+        }
+      }
+    ],
+    "serial_number": 3
+  },
+  {
+    "name": "buy dog",
+    "nodes": [
+      {
+        "uniq_id": "1",
+        "type": "START",
+        "name": "Node 1",
+        "description": "",
+        "tool": "",
+        "nexts": [
+          "2"
+        ],
+        "true_next": null,
+        "false_next": null,
+        "ext": {
+          "pos_x": 210,
+          "pos_y": 105,
+          "width": 150,
+          "height": 200,
+          "info": null
+        }
+      },
+      {
+        "uniq_id": "2",
+        "type": "STEP",
+        "name": "Node 2",
+        "description": "feed a dog",
+        "tool": "",
+        "nexts": [],
+        "true_next": null,
+        "false_next": null,
+        "ext": {
+          "pos_x": 640,
+          "pos_y": 184,
+          "width": 150,
+          "height": 200,
+          "info": null
+        }
+      }
+    ],
+    "serial_number": 3
+  }
+]
\ No newline at end of file
diff --git a/trpg_play.json b/trpg_play.json
index d631746..1eb38b1 100644
--- a/trpg_play.json
+++ b/trpg_play.json
@@ -1,19 +1,21 @@
-{
+[
+  {
+    "name": "root",
     "nodes": [
       {
         "uniq_id": "uniq_id_10",
-        "nexts": [
-          "uniq_id_7"
-        ],
         "type": "STEP",
         "name": "Step2",
-        "description": "As a Player, I want to perform an action. (in short, we do fast play) Output the JSON in the format: {{\"action\": \"palyer: I want xxxx\"}}\nIf you see need_roll, then output json {{\"action\": \"palyer: roll x\"}}, you random gen x",
+        "description": "As a Player, I want to perform an action. (in short, we do fast play) Output the JSON in the format: {{\"action\": \"palyer:because blablabla I want xxxx\"}}",
         "tool": "",
+        "nexts": [
+          "uniq_id_7"
+        ],
         "true_next": null,
         "false_next": null,
         "ext": {
-          "pos_x": 799.4,
-          "pos_y": 141.1999999999999,
+          "pos_x": 960.009555910482,
+          "pos_y": 148.07991229613796,
           "width": 358,
           "height": 459,
           "info": ""
@@ -21,18 +23,18 @@
       },
       {
         "uniq_id": "uniq_id_7",
-        "nexts": [
-          "uniq_id_10"
-        ],
         "type": "STEP",
         "name": "Step1",
-        "description": "As DnD DM, describe the current scenario for the player. (in short, we do fast play) sometimes roll dice, sometimes not. player roll , if > 0 you need explain what the roll affect result, start from your roll blablabla Output the JSON in the format: {{\"scenario\": \"DM: your action description\", \"need_roll\": True/False}} 50% case need roll",
+        "description": "As DnD DM, describe the next story for the player.  (in short, we do fast play)  output format: {{\"story\": \"DM: because you blablabla\"}} ",
         "tool": "",
+        "nexts": [
+          "uniq_id_10"
+        ],
         "true_next": null,
         "false_next": null,
         "ext": {
-          "pos_x": 324,
-          "pos_y": -119.4,
+          "pos_x": 402.26505848642046,
+          "pos_y": 12.264473582491112,
           "width": 388,
           "height": 527,
           "info": ""
@@ -40,23 +42,43 @@
       },
       {
         "uniq_id": "uniq_id_1",
+        "type": "STEP",
+        "name": "Node",
+        "description": "As DnD DM, describe the secene for the player.  (in short, we do fast play)  output format: {{\"scenario\": \"DM: <describe>\"}} ",
+        "tool": "",
         "nexts": [
           "uniq_id_7"
         ],
+        "true_next": null,
+        "false_next": null,
+        "ext": {
+          "pos_x": -44.70780224171054,
+          "pos_y": -59.723776200616605,
+          "width": 264,
+          "height": 351,
+          "info": ""
+        }
+      },
+      {
+        "uniq_id": "11",
         "type": "START",
-        "name": "Node",
+        "name": "Node 11",
         "description": "",
         "tool": "",
+        "nexts": [
+          "uniq_id_1"
+        ],
         "true_next": null,
         "false_next": null,
         "ext": {
-          "pos_x": 37,
-          "pos_y": 54,
-          "width": 200,
+          "pos_x": -316.4791241918573,
+          "pos_y": -129.3754157722915,
+          "width": 150,
           "height": 200,
-          "info": ""
+          "info": null
         }
       }
     ],
-    "node_counter": 11
-  }
\ No newline at end of file
+    "serial_number": 12
+  }
+]
\ No newline at end of file