diff --git a/playground/Demo1/Main.snow b/playground/Demo1/Main.snow
index 08eeda8..89efc03 100644
--- a/playground/Demo1/Main.snow
+++ b/playground/Demo1/Main.snow
@@ -1,11 +1,9 @@
 module: Main
     import:Math
     function: main
-        parameter:
-        return_type: int
+        return_type: void
         body:
-            Math.factorial(6L,1L)
-            return 0
+            Math.add(6,1)
         end body
     end function
 end module
diff --git a/playground/Demo1/Math.snow b/playground/Demo1/Math.snow
index bfe8605..2e5963e 100644
--- a/playground/Demo1/Math.snow
+++ b/playground/Demo1/Math.snow
@@ -1,11 +1,11 @@
 module: Math
-    function: factorial
+    function: add
         parameter:
-            declare n1: long
-            declare n2: long
-        return_type: long
+            declare n1: int
+            declare n2: int
+        return_type: int
         body:
-           return n1+n2
+           return n1 + n2
         end body
     end function
 end module
\ No newline at end of file