diff --git a/assets/node.png b/assets/node.png
new file mode 100644
index 0000000..3b2a388
Binary files /dev/null and b/assets/node.png differ
diff --git a/docs/agent.md b/docs/agent.md
index c12701a..3631fd1 100644
--- a/docs/agent.md
+++ b/docs/agent.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Agent"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 6
 ---
 
diff --git a/docs/decomp.md b/docs/decomp.md
index ad6536e..cdd84a0 100644
--- a/docs/decomp.md
+++ b/docs/decomp.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Workflow"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 2
 ---
 
diff --git a/docs/guide.md b/docs/guide.md
index 98e4c16..21907bd 100644
--- a/docs/guide.md
+++ b/docs/guide.md
@@ -10,11 +10,11 @@ nav_order: 1
 
 ## System Design Steps
 
-1. **Project Requirements**  
-   - Identify the project's core entities, and provide a step-by-step user story.  
-   - Define a list of both functional and non-functional requirements.
+1. **Project Requirements**: Understand what the project is for and what are required.
+
+2. **Utility Functions**: LLM Systems are like the brain
+
 
-2. **Utility Functions**  
    - Determine the utility functions on which this project depends (e.g., for LLM calls, web searches, file handling).  
    - Implement these functions and write basic tests to confirm they work correctly.
 
diff --git a/docs/index.md b/docs/index.md
index ffa4d6b..48294d6 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -37,7 +37,7 @@ We model the LLM workflow as a **Nested Directed Graph**:
 - [(Advanced) Async](./async.md)
 - [(Advanced) Parallel](./parallel.md)
 
-## Utility Functions
+## Utility Function
 
 - [LLM Wrapper](./llm.md)
 - [Tool](./tool.md)
@@ -48,7 +48,7 @@ We model the LLM workflow as a **Nested Directed Graph**:
 {: .warning }
 
 
-## Design Patterns
+## Design Pattern
 
 - [Structured Output](./structure.md)
 - [Workflow](./decomp.md)
diff --git a/docs/llm.md b/docs/llm.md
index b3ffd51..96cd8c1 100644
--- a/docs/llm.md
+++ b/docs/llm.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "LLM Wrapper"
-parent: "Utility"
+parent: "Utility Function"
 nav_order: 1
 ---
 
diff --git a/docs/mapreduce.md b/docs/mapreduce.md
index 8698192..7f1dd1f 100644
--- a/docs/mapreduce.md
+++ b/docs/mapreduce.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Map Reduce"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 3
 ---
 
diff --git a/docs/memory.md b/docs/memory.md
index 09dc538..e94fbbf 100644
--- a/docs/memory.md
+++ b/docs/memory.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Chat Memory"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 5
 ---
 
diff --git a/docs/multi_agent.md b/docs/multi_agent.md
index ed64c4a..3f5937f 100644
--- a/docs/multi_agent.md
+++ b/docs/multi_agent.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "(Advanced) Multi-Agents"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 7
 ---
 
diff --git a/docs/node.md b/docs/node.md
index 9554cf0..83fd0bf 100644
--- a/docs/node.md
+++ b/docs/node.md
@@ -26,6 +26,11 @@ A **Node** is the smallest building block. Each Node has 3 steps `prep->exec->po
    - Examples: *update DB, change states, log results*.
    - **Decide the next action** by returning a *string* (`action = "default"` if *None*).
 
+<div align="center">
+  <img src="https://github.com/the-pocket/PocketFlow/raw/main/assets/node.png?raw=true" width="400"/>
+</div>
+
+
 > **Why 3 steps?** To enforce the principle of *separation of concerns*. The data storage and data processing are operated separately.
 >
 > All steps are *optional*. E.g., you can only implement `prep` and `post` if you just need to process data.
diff --git a/docs/paradigm.md b/docs/paradigm.md
index 37889b8..ec24d5d 100644
--- a/docs/paradigm.md
+++ b/docs/paradigm.md
@@ -1,6 +1,6 @@
 ---
 layout: default
-title: "Design"
+title: "Design Pattern"
 nav_order: 4
 has_children: true
 ---
\ No newline at end of file
diff --git a/docs/preparation.md b/docs/preparation.md
index 4fe5f00..62216b0 100644
--- a/docs/preparation.md
+++ b/docs/preparation.md
@@ -1,6 +1,6 @@
 ---
 layout: default
-title: "Utility"
+title: "Utility Function"
 nav_order: 3
 has_children: true
 ---
\ No newline at end of file
diff --git a/docs/rag.md b/docs/rag.md
index 35d5c8b..6aeb028 100644
--- a/docs/rag.md
+++ b/docs/rag.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "RAG"
-parent: "Design" 
+parent: "Design Pattern"
 nav_order: 4
 ---
 
diff --git a/docs/structure.md b/docs/structure.md
index d379083..91d6083 100644
--- a/docs/structure.md
+++ b/docs/structure.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Structured Output"
-parent: "Design"
+parent: "Design Pattern"
 nav_order: 1
 ---
 
diff --git a/docs/tool.md b/docs/tool.md
index 262c7d8..e4dbe19 100644
--- a/docs/tool.md
+++ b/docs/tool.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Tool"
-parent: "Utility"
+parent: "Utility Function"
 nav_order: 2
 ---
 
diff --git a/docs/viz.md b/docs/viz.md
index 0841079..26f6c80 100644
--- a/docs/viz.md
+++ b/docs/viz.md
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: "Viz and Debug"
-parent: "Utility"
+parent: "Utility Function"
 nav_order: 3
 ---