diff --git a/example/helper.go b/example/helper.go
new file mode 100644
index 0000000..93fe099
--- /dev/null
+++ b/example/helper.go
@@ -0,0 +1,5 @@
+package main
+
+func privateHelperFunc() int {
+    return 25
+}
diff --git a/example/main.go b/example/main.go
new file mode 100644
index 0000000..b12142c
--- /dev/null
+++ b/example/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+	"example/math" 
+	"util"
+)
+
+func main() {
+    fmt.Println("Hello world! My lucky number is", math.Mul2(privateHelperFunc()))
+    fmt.Println("Square:::", util.Square(60))
+}
diff --git a/example/math/math.go b/example/math/math.go
new file mode 100644
index 0000000..82c2833
--- /dev/null
+++ b/example/math/math.go
@@ -0,0 +1,5 @@
+package math
+
+func Mul2(x int) int {
+    return x * 2
+}
diff --git a/util/main.go b/util/main.go
new file mode 100644
index 0000000..c97df74
--- /dev/null
+++ b/util/main.go
@@ -0,0 +1,15 @@
+package util
+
+import "math"
+
+func Square(x float32) float32 {
+    return x * x
+}
+
+func Circle(r float32) float32 {
+    return math.Pi * r * r
+}
+
+func cube(x float32) float32 {
+    return x * x * x
+}