diff --git a/koodi.rb b/koodi.rb
new file mode 100644
index 0000000..5c48abb
--- /dev/null
+++ b/koodi.rb
@@ -0,0 +1,7 @@
+def tulosta x
+  if block_given?
+    puts yield x
+  else
+    puts x
+  end
+end
\ No newline at end of file