diff --git a/Assets/AsmdefGraph/Editor/AsmdefGraphView.cs b/Assets/AsmdefGraph/Editor/AsmdefGraphView.cs
index 4522780..b26891d 100644
--- a/Assets/AsmdefGraph/Editor/AsmdefGraphView.cs
+++ b/Assets/AsmdefGraph/Editor/AsmdefGraphView.cs
@@ -1,9 +1,17 @@
-using UnityEditor.Experimental.GraphView;
+using System.Collections.Generic;
+using UnityEditor.Experimental.GraphView;
+using UnityEngine.UIElements;
 
 namespace AsmdefGraph.Editor {
     public class AsmdefGraphView : GraphView {
         public AsmdefGraphView() : base() {
             AddElement(new AsmdefNode());
+            AddElement(new AsmdefNode());
+            this.AddManipulator(new SelectionDragger());
+        }
+
+        public override List<Port> GetCompatiblePorts(Port startAnchor, NodeAdapter nodeAdapter) {
+            return ports.ToList();
         }
     }
 }
diff --git a/Assets/AsmdefGraph/Editor/AsmdefNode.cs b/Assets/AsmdefGraph/Editor/AsmdefNode.cs
index d679ce9..de87533 100644
--- a/Assets/AsmdefGraph/Editor/AsmdefNode.cs
+++ b/Assets/AsmdefGraph/Editor/AsmdefNode.cs
@@ -2,6 +2,14 @@
 
 namespace AsmdefGraph.Editor {
     public class AsmdefNode : Node {
+        public AsmdefNode() {
+            title = "AsmdefNode";
 
+            var inputPort = Port.Create<Edge>(Orientation.Horizontal, Direction.Input, Port.Capacity.Single, typeof(Port));
+            inputContainer.Add(inputPort);
+
+            var outputPort = Port.Create<Edge>(Orientation.Horizontal, Direction.Output, Port.Capacity.Single, typeof(Port));
+            outputContainer.Add(outputPort);
+        }
     }
 }