diff --git a/mindmaps/electricity/electricity.yaml b/mindmaps/electricity/electricity.yaml
new file mode 100644
index 0000000..e69de29
diff --git a/mindmaps/electricity/output.html b/mindmaps/electricity/output.html
new file mode 100644
index 0000000..1699e73
--- /dev/null
+++ b/mindmaps/electricity/output.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta http-equiv="X-UA-Compatible" content="ie=edge">
+<title>Markmap</title>
+<style>
+* {
+  margin: 0;
+  padding: 0;
+}
+#mindmap {
+  display: block;
+  width: 100vw;
+  height: 100vh;
+}
+</style>
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/markmap-toolbar@0.15.8/dist/style.css">
+</head>
+<body>
+<svg id="mindmap"></svg>
+<script src="https://cdn.jsdelivr.net/npm/d3@7.8.5/dist/d3.min.js"></script><script src="https://cdn.jsdelivr.net/npm/markmap-view@0.15.8/dist/browser/index.js"></script><script src="https://cdn.jsdelivr.net/npm/markmap-toolbar@0.15.8/dist/index.js"></script><script>((r) => {
+            setTimeout(r);
+          })(() => {
+  const { markmap, mm } = window;
+  const toolbar = new markmap.Toolbar();
+  toolbar.attach(mm);
+  const el = toolbar.render();
+  el.setAttribute("style", "position:absolute;bottom:20px;right:20px");
+  document.body.append(el);
+})</script><script>((getMarkmap, getOptions, root2, jsonOptions) => {
+                const markmap = getMarkmap();
+                window.mm = markmap.Markmap.create(
+                  "svg#mindmap",
+                  (getOptions || markmap.deriveOptions)(jsonOptions),
+                  root2
+                );
+              })(() => window.markmap,null,{"type":"heading","depth":0,"payload":{"lines":[0,1]},"content":"Main","children":[{"type":"heading","depth":1,"payload":{"lines":[1,2]},"content":"Sub 1","children":[{"type":"heading","depth":2,"payload":{"lines":[2,3]},"content":"Sub 1a","children":[]},{"type":"heading","depth":2,"payload":{"lines":[3,4]},"content":"Sub 1b","children":[]},{"type":"heading","depth":2,"payload":{"lines":[4,5]},"content":"Sub 1c","children":[]}]},{"type":"heading","depth":1,"payload":{"lines":[5,6]},"content":"Sub 2","children":[{"type":"heading","depth":2,"payload":{"lines":[6,7]},"content":"Sub 2a","children":[]},{"type":"heading","depth":2,"payload":{"lines":[7,8]},"content":"Sub 2b","children":[]},{"type":"heading","depth":2,"payload":{"lines":[8,9]},"content":"Sub 2c","children":[]}]},{"type":"heading","depth":1,"payload":{"lines":[9,10]},"content":"Sub 3","children":[{"type":"heading","depth":2,"payload":{"lines":[10,11]},"content":"Sub 3a","children":[]},{"type":"heading","depth":2,"payload":{"lines":[11,12]},"content":"Sub 3b","children":[{"type":"heading","depth":3,"payload":{"lines":[12,13]},"content":"Sub 3bI","children":[]},{"type":"heading","depth":3,"payload":{"lines":[13,14]},"content":"Sub 3bII","children":[]}]}]}]},null)</script>
+</body>
+</html>
diff --git a/mindmaps/electricity/output.md b/mindmaps/electricity/output.md
new file mode 100644
index 0000000..21795ab
--- /dev/null
+++ b/mindmaps/electricity/output.md
@@ -0,0 +1,14 @@
+# Main
+## Sub 1
+### Sub 1a
+### Sub 1b
+### Sub 1c
+## Sub 2
+### Sub 2a
+### Sub 2b
+### Sub 2c
+## Sub 3
+### Sub 3a
+### Sub 3b
+#### Sub 3bI
+#### Sub 3bII
\ No newline at end of file
diff --git a/mindmaps/electricity/yaml-mindmap b/mindmaps/electricity/yaml-mindmap
new file mode 160000
index 0000000..4f82e58
--- /dev/null
+++ b/mindmaps/electricity/yaml-mindmap
@@ -0,0 +1 @@
+Subproject commit 4f82e5886628bd8be2802534cf77795f7f44b28f
