diff --git a/playground/Demo/Demo22/Main.snow b/playground/Demo/Demo22/Main.snow
new file mode 100644
index 0000000..1c727b4
--- /dev/null
+++ b/playground/Demo/Demo22/Main.snow
@@ -0,0 +1,12 @@
+module: Main
+    import: os,ModuleA
+    globals:
+        declare sum: int = 3
+    function: main
+        returns: void
+        body:
+            sum = sum + ModuleA._sum(1, 2)
+            os.print(sum)
+        end body
+    end function
+end module
diff --git a/playground/Demo/Demo22/ModuleA.snow b/playground/Demo/Demo22/ModuleA.snow
new file mode 100644
index 0000000..c5c9a86
--- /dev/null
+++ b/playground/Demo/Demo22/ModuleA.snow
@@ -0,0 +1,11 @@
+module: ModuleA
+    function: _sum
+        params:
+            declare a: int
+            declare b: int
+        returns: int
+        body:
+            return a + b
+        end body
+    end function
+end module
\ No newline at end of file
diff --git a/playground/Demo/Demo22/OS.snow b/playground/Demo/Demo22/OS.snow
new file mode 100644
index 0000000..1982627
--- /dev/null
+++ b/playground/Demo/Demo22/OS.snow
@@ -0,0 +1,11 @@
+module: os
+    import: os
+    function: print
+        params:
+            declare i1: int
+        returns: void
+        body:
+            syscall("PRINT",i1)
+        end body
+    end function
+end module
\ No newline at end of file