diff --git a/_demo/osexec/exec.go b/_demo/osexec/exec.go
new file mode 100644
index 00000000..ec983c4b
--- /dev/null
+++ b/_demo/osexec/exec.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"runtime"
+)
+
+func main() {
+	ls := "ls"
+	if runtime.GOOS == "windows" {
+		ls = "dir"
+	}
+	cmd := exec.Command(ls)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Run()
+}