add logo in json format

logo.json

@@ -0,0 +1,141 @@
+{
+  "layers": [
+    [
+      {
+        "layers": [
+          [
+            {
+              "name": "n1"
+            },
+            {
+              "name": "n2"
+            }
+          ],
+          [
+            {
+              "name": "n3"
+            },
+            {
+              "name": "n4"
+            }
+          ]
+        ],
+        "edges": [
+          {
+            "source": "n1",
+            "target": "n4"
+          },
+          {
+            "source": "n2",
+            "target": "n4"
+          }
+        ],
+        "name": "n1"
+      },
+      {
+        "layers": [
+          [
+            {
+              "name": "n1"
+            },
+            {
+              "name": "n2"
+            }
+          ],
+          [
+            {
+              "name": "n3"
+            },
+            {
+              "name": "n4"
+            }
+          ]
+        ],
+        "edges": [
+          {
+            "source": "n1",
+            "target": "n4"
+          },
+          {
+            "source": "n2",
+            "target": "n3"
+          }
+        ],
+        "name": "n2"
+      }
+    ],
+    [
+      {
+        "layers": [
+          [
+            {
+              "name": "n1"
+            },
+            {
+              "name": "n2"
+            }
+          ],
+          [
+            {
+              "name": "n3"
+            },
+            {
+              "name": "n4"
+            }
+          ]
+        ],
+        "edges": [
+          {
+            "source": "n1",
+            "target": "n3"
+          },
+          {
+            "source": "n2",
+            "target": "n4"
+          },
+          {
+            "source": "n2",
+            "target": "n3"
+          }
+        ],
+        "name": "n3"
+      },
+      {
+        "layers": [
+          [
+            {
+              "name": "n1"
+            },
+            {
+              "name": "n2"
+            }
+          ],
+          [
+            {
+              "name": "n3"
+            },
+            {
+              "name": "n4"
+            }
+          ]
+        ],
+        "name": "n4"
+      }
+    ]
+  ],
+  "edges": [
+    {
+      "source": "n1",
+      "target": "n3"
+    },
+    {
+      "source": "n1",
+      "target": "n4"
+    },
+    {
+      "source": "n2",
+      "target": "n4"
+    }
+  ],
+  "name": "n0"
+}