diff --git a/src/Traversal.java b/src/Traversal.java
index 8da0f79..b877d72 100644
--- a/src/Traversal.java
+++ b/src/Traversal.java
@@ -1,5 +1,48 @@
 public class Traversal {
   public static void main(String[] args) {
+    TreeNode root = new TreeNode(10);
+    
+    root.left = new TreeNode(9);
+    root.right = new TreeNode(15);
 
+    root.left.left = new TreeNode(5);
+    root.left.right = new TreeNode(2);
+
+    root.right.left = new TreeNode(-3);
+    root.right.right = new TreeNode(5);
+
+    root.right.right.right = new TreeNode(22);
+
+    int result = sum(root);
+    System.out.println(result);
+    result = oddSum(root);
+    System.out.println(result);
+  }
+
+  public static void preorder (TreeNode current) {
+    if (current == null) return;
+    System.out.println(current.data);
+    preorder(current.left);
+    preorder(current.right);
+
+  }
+
+  public static int sum (TreeNode node) {
+    if (node == null) return 0;
+    int total = node.data;
+    total += sum(node.left);
+    total += sum(node.right);
+    return total;
+  }
+
+  public static int oddSum (TreeNode node) {
+    if (node == null) return 0;
+    int total = 0;
+    if (node.data % 2 != 0) {
+      total += node.data;
+    }
+    total += oddSum(node.left);
+    total += oddSum(node.right);
+    return total;
   }
 }
diff --git a/src/TreeNode.java b/src/TreeNode.java
index acd9639..e5c6e65 100644
--- a/src/TreeNode.java
+++ b/src/TreeNode.java
@@ -1,4 +1,9 @@
 public class TreeNode {
+    public int data;
+    public TreeNode left;
+    public TreeNode right;
 
-  
+    public TreeNode (int data) {
+        this.data = data;
+    }
 }
\ No newline at end of file