diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba077a4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+bin
diff --git a/bin/Factorial.class b/bin/Factorial.class
deleted file mode 100644
index a2af7ca..0000000
Binary files a/bin/Factorial.class and /dev/null differ
diff --git a/bin/Hello.class b/bin/Hello.class
deleted file mode 100644
index 431ada1..0000000
Binary files a/bin/Hello.class and /dev/null differ
diff --git a/src/Factorial.jas b/src/Factorial.jas
index 5511b7d..b2132d5 100644
--- a/src/Factorial.jas
+++ b/src/Factorial.jas
@@ -44,8 +44,9 @@
 
 .method public static main([Ljava/lang/String;)V
     .limit locals 1
-    .limit stack  3
+    .limit stack  2
     getstatic     java/lang/System/out Ljava/io/PrintStream;
+    ldc "Hello world"
     invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V 
     return
 .end method