diff --git a/forum-network/src/classes/action.js b/forum-network/src/classes/action.js
index 4eb9a61..ad2e628 100644
--- a/forum-network/src/classes/action.js
+++ b/forum-network/src/classes/action.js
@@ -6,10 +6,12 @@ export class Action {
 
   async log(src, dest, msg, obj, symbol = '->>') {
     const logObj = false;
-    await this.scene.sequence.log(
-      `${src.name} ${symbol} ${dest.name} : ${this.name} ${msg ?? ''} ${
-        logObj && obj ? JSON.stringify(obj) : ''
-      }`,
-    );
+    if (this.scene.sequence) {
+      await this.scene.sequence.log(
+        `${src.name} ${symbol} ${dest.name} : ${this.name} ${msg ?? ''} ${
+          logObj && obj ? JSON.stringify(obj) : ''
+        }`,
+      );
+    }
   }
 }
diff --git a/forum-network/src/classes/graph.js b/forum-network/src/classes/graph.js
index 6136d4e..075b933 100644
--- a/forum-network/src/classes/graph.js
+++ b/forum-network/src/classes/graph.js
@@ -44,7 +44,7 @@ export class Graph {
     }
     const vertex = new Vertex(data);
     this.vertices.set(id, vertex);
-    if (this.scene.flowchart) {
+    if (this.scene && this.scene.flowchart) {
       this.scene.flowchart.log(`${id}[${label ?? id}]`);
     }
     return this;
diff --git a/forum-network/src/classes/scene.js b/forum-network/src/classes/scene.js
index 4d71e48..e6c0ce0 100644
--- a/forum-network/src/classes/scene.js
+++ b/forum-network/src/classes/scene.js
@@ -89,7 +89,7 @@ export class Scene {
   async addActor(name) {
     const actor = new Actor(name, this);
     if (this.sequence) {
-      await this.scene.sequence.log(`participant ${name}`);
+      await this.sequence.log(`participant ${name}`);
     }
     return actor;
   }
diff --git a/forum-network/src/index.html b/forum-network/src/index.html
index a583987..bb90cf3 100644
--- a/forum-network/src/index.html
+++ b/forum-network/src/index.html
@@ -18,7 +18,6 @@
   <h3>Tertiary</h3>
   <ul>
     <li><a href="./tests/basic.html">Basic</a></li>
-    <li><a href="./tests/mermaid.html">Mermaid</a></li>
     <li><a href="./tests/graph.html">Graph</a></li>
     <li><a href="./tests/debounce.html">Debounce</a></li>
     <li><a href="./tests/flowchart.html">Flowchart</a></li>
diff --git a/forum-network/src/tests/basic.html b/forum-network/src/tests/basic.html
index 9bb8cfa..8bd95c1 100644
--- a/forum-network/src/tests/basic.html
+++ b/forum-network/src/tests/basic.html
@@ -26,14 +26,14 @@
   }
 
   if (true) {
-    const scene = new Scene('Scene 1', rootBox);
+    const scene = new Scene('Scene 1', rootBox).withSequenceDiagram();
     const webClientStatus = scene.addDisplayValue('WebClient Status');
     const node1Status = scene.addDisplayValue('Node 1 Status');
     const blockchainStatus = scene.addDisplayValue('Blockchain Status');
 
-    const webClient = scene.addActor('web client');
-    const node1 = scene.addActor('node 1');
-    const blockchain = scene.addActor('blockchain');
+    const webClient = await scene.addActor('web client');
+    const node1 = await scene.addActor('node 1');
+    const blockchain = await scene.addActor('blockchain');
     const requestForumPage = scene.addAction('requestForumPage');
     const readBlockchainData = scene.addAction('readBlockchainData');
     const blockchainData = scene.addAction('blockchainData');
@@ -76,19 +76,19 @@
   }
 
   (async function run() {
-    const scene = new Scene('Scene 2', rootBox);
+    const scene = new Scene('Scene 2', rootBox).withSequenceDiagram();
 
-    const webClient = scene.addActor('webClient');
+    const webClient = await scene.addActor('webClient');
 
     const nodes = [];
     const memories = [];
     const storages = [];
 
-    function addNode() {
+    async function addNode() {
       const idx = nodes.length;
-      const node = scene.addActor(`node${idx}`);
-      const memory = scene.addActor(`memory${idx}`);
-      const storage = scene.addActor(`storage${idx}`);
+      const node = await scene.addActor(`node${idx}`);
+      const memory = await scene.addActor(`memory${idx}`);
+      const storage = await scene.addActor(`storage${idx}`);
       node.memory = memory;
       node.storage = storage;
       nodes.push(node);
@@ -103,8 +103,8 @@
       return peers[idx];
     }
 
-    addNode();
-    addNode();
+    await addNode();
+    await addNode();
 
     const [
       seekTruth,
diff --git a/forum-network/src/tests/forum-network.html b/forum-network/src/tests/forum-network.html
index 25e61c0..307aead 100644
--- a/forum-network/src/tests/forum-network.html
+++ b/forum-network/src/tests/forum-network.html
@@ -19,9 +19,7 @@
   const rootElement = document.getElementById('forum-network');
   const rootBox = new Box('rootBox', rootElement).flex();
 
-  window.scene = new Scene('Forum Network test', rootBox).log(
-    'sequenceDiagram',
-);
+  window.scene = new Scene('Forum Network test', rootBox).withSequenceDiagram();
 
   window.author1 = await new Expert('author1', window.scene).initialize();
   window.author2 = await new Expert('author2', window.scene).initialize();