[from now] 2014/01/02 18:44:56
[from now] 2014/01/02 19:12:59

diff --git a/4.go b/4.go
new file mode 100644
index 0000000..00f0447
--- /dev/null
+++ b/4.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func main() {
+	now := time.Now().UnixNano()
+	random := rand.New(rand.NewSource(now))
+	fmt.Println("My favorite number is", random.Intn(10))
+}