diff --git a/s-day05/src/com/inmind/thread07/Demo13.java b/s-day05/src/com/inmind/thread07/Demo13.java
new file mode 100644
index 0000000..433ae2b
--- /dev/null
+++ b/s-day05/src/com/inmind/thread07/Demo13.java
@@ -0,0 +1,14 @@
+package com.inmind.thread07;
+
+public class Demo13 {
+    public static void main(String[] args) {
+        for (int i = 0; i < 100; i++) {
+            System.out.println("helloworld");
+        }
+        System.out.println("--------------");
+        for (int i = 0; i < 100; i++) {
+            System.out.println("hellojava");
+        }
+        System.out.println("程序结束");
+    }
+}