diff --git a/homework2/.eide/eide.json b/homework2/.eide/eide.json
index d6da857..a931c1c 100644
--- a/homework2/.eide/eide.json
+++ b/homework2/.eide/eide.json
@@ -20,7 +20,8 @@
     "Debug": {
       "excludeList": [
         "src/test1.c",
-        "src/test2.c"
+        "src/test2.c",
+        "src/test3.c"
       ],
       "toolchain": "Keil_C51",
       "compileConfig": {
diff --git a/homework2/src/test4.c b/homework2/src/test4.c
index f216205..d4e25c7 100644
--- a/homework2/src/test4.c
+++ b/homework2/src/test4.c
@@ -1,11 +1,20 @@
-//test4.c
-//让2个LED灯交替闪烁
+// test4.c
+// 让2个LED灯交替闪烁
 #include <reg52.h>
 #include "homework2.h"
-void main(){
-	ENLED = 0;
-	ADDR3 = 1;
-	ADDR2 = 1;
-	ADDR1 = 1;
-	ADDR0 = 0;
+void main()
+{
+    ENLED = 0;
+    ADDR3 = 1;
+    ADDR2 = 1;
+    ADDR1 = 1;
+    ADDR0 = 0;
+    while (1) {
+        D1 = 0;
+        D2 = 1;
+        Delay(100000);
+        D1 = 1;
+        D2 = 0;
+        Delay(100000);
+    }
 }
\ No newline at end of file