diff --git a/ConsoleDemo/Program.cs b/ConsoleDemo/Program.cs
index 92fd6da..488d29a 100644
--- a/ConsoleDemo/Program.cs
+++ b/ConsoleDemo/Program.cs
@@ -8,42 +8,56 @@ using Semantics;
 
 namespace ConsoleDemo
 {
+    internal class TreeRenderer
+    {
+        private static void RenderToken(SyntaxToken token, string indent, bool isLast)
+        {
+            Console.Write(indent + (isLast ? "└── " : "├── "));
+            Console.Write($"<{token.Kind}>");
+            Console.Write($" {token.Text}");
+            Console.WriteLine();
+        }
+
+        private static void RenderNode(SyntaxNode node, string indent, bool isLast)
+        {
+            Console.Write(indent);
+            Console.Write(isLast ? "└── " : "├── ");
+            Console.Write($"<{node.Kind}>");
+            Console.WriteLine();
+            var children = node.GetChildNodesAndTokens();
+            var last = children.Count - 1;
+            indent += isLast ? "    " : "│   ";
+            for (var index = 0; index <= last; index++)
+            {
+                var child = children[index];
+                if (child.IsNode)
+                {
+                    RenderNode(child.AsNode(), indent, index == last);
+                } else if (child.IsToken)
+                {
+                    RenderToken(child.AsToken(), indent, index == last);
+                }
+            }
+        }
+
+        public static void Render(SyntaxNode node)
+        {
+            RenderNode(node, "", true);
+        }
+    }
+
     class Program
     {
         private static readonly string BaseDirectory;
         private const string BaseDirectoryMacOs = @"/Applications/MATLAB_R2017b.app/toolbox/matlab/";
         private const string BaseDirectoryWindows = @"D:\Program Files\MATLAB\R2018a\toolbox\matlab\";
 
-        private static readonly HashSet<string> SkipFiles = new HashSet<string>
-        {
-            @"codetools\private\template.m", // this is a template, so it contains '$' characters.
-            @"plottools\+matlab\+graphics\+internal\+propertyinspector\+views\CategoricalHistogramPropertyView.m", // this one contains a 0xA0 character (probably it's 'non-breakable space' in Win-1252).
-            @"plottools\+matlab\+graphics\+internal\+propertyinspector\+views\PrimitiveHistogram2PropertyView.m", // same
-            @"plottools\+matlab\+graphics\+internal\+propertyinspector\+views\PrimitiveHistogramPropertyView.m", // same
-            @"codetools/private/template.m", // this is a template, so it contains '$' characters.
-            @"plottools/+matlab/+graphics/+internal/+propertyinspector/+views/CategoricalHistogramPropertyView.m", // this one contains a 0xA0 character (probably it's 'non-breakable space' in Win-1252).
-            @"plottools/+matlab/+graphics/+internal/+propertyinspector/+views/PrimitiveHistogram2PropertyView.m", // same
-            @"plottools/+matlab/+graphics/+internal/+propertyinspector/+views/PrimitiveHistogramPropertyView.m", // same
-        };
 
         private static MParser CreateParser(ITextWindow window)
         {
             return new MParser(window);
         }
 
-        private static void ProcessFile(string fileName)
-        {
-            var text = File.ReadAllText(fileName);
-            var window = new TextWindowWithNull(text, fileName);
-            var parser = CreateParser(window);
-            var tree = parser.Parse();
-            var actual = tree.FullText;
-            if (actual != text)
-            {
-                throw new ApplicationException();
-            }
-        }
-
         static Program()
         {
             switch (Environment.OSVersion.Platform)
@@ -57,41 +71,19 @@ namespace ConsoleDemo
                     break;
             }
         }
-
-        private static int ProcessDirectory(string directory)
-        {
-            var counter = 0;
-            var files = Directory.GetFiles(directory, "*.m");
-            foreach (var file in files)
-            {
-                var relativePath = Path.GetRelativePath(BaseDirectory, file);
-                if (SkipFiles.Contains(relativePath))
-                {
-                    continue;
-                }
-                ProcessFile(file);
-                counter++;
-            }
-
-            var subDirectories = Directory.GetDirectories(directory);
-            foreach (var subDirectory in subDirectories)
-            {
-                counter += ProcessDirectory(subDirectory);
-            }
-
-            return counter;
-        }
         
         private static void ParserDemo()
         {
             Console.WriteLine("Hello World!");
-            var sw = new Stopwatch();
-            sw.Start();
-            var processed = ProcessDirectory(BaseDirectory);
-            sw.Stop();
-            Console.WriteLine($"{processed} files parsed. Elapsed: {sw.Elapsed}.");
-            //AfterFunctionFinish();
-            //FirstTokenFinish();
+            var text = @"
+                function [a, b c] = functionName(d, e, f)
+                    a = d + e;
+                end
+                ";
+            var window = new TextWindowWithNull(text, "noname");
+            var parser = CreateParser(window);
+            var tree = parser.Parse();
+            TreeRenderer.Render(tree);
             Console.ReadKey();            
         }
 
@@ -161,11 +153,11 @@ namespace ConsoleDemo
 
         public static void Main(string[] args)
         {
-            //ParserDemo();
+            ParserDemo();
             //SemanticsDemo();
             //ContextDemo();
             //DumbPrinterDemo();
-            UsageDemo();
+            //UsageDemo();
             Console.ReadKey();
         }
     }