diff --git a/playground/Main.snow b/playground/Demo1/Main.snow
similarity index 100%
rename from playground/Main.snow
rename to playground/Demo1/Main.snow
diff --git a/playground/Math.snow b/playground/Demo1/Math.snow
similarity index 95%
rename from playground/Math.snow
rename to playground/Demo1/Math.snow
index 161b7b2..bfe8605 100644
--- a/playground/Math.snow
+++ b/playground/Demo1/Math.snow
@@ -8,4 +8,4 @@ module: Math
            return n1+n2
         end body
     end function
-end module
+end module
\ No newline at end of file
diff --git a/playground/Demo2/Main.snow b/playground/Demo2/Main.snow
new file mode 100644
index 0000000..1b1833f
--- /dev/null
+++ b/playground/Demo2/Main.snow
@@ -0,0 +1,9 @@
+module: Main
+    function: main
+        parameter:
+        return_type: int
+        body:
+           return (1+2) / 3 * 4 + 2 *2
+        end body
+    end function
+end module
\ No newline at end of file