Cuts down trees, or.. anything really. Don't put against a wall and execute.

lumberjack

@@ -0,0 +1,26 @@
+function up()
+  turtle.digUp()
+  turtle.up()
+end
+
+function get_down()
+  while turtle.down() do end
+end
+
+function dig()
+  return turtle.dig()
+end
+
+
+function cut_tree()
+  success = dig()
+  if success then
+    up()
+    cut_tree()
+  else
+    get_down()
+  end
+end
+
+cut_tree()
+