diff --git a/content/developer/guide.md b/content/developer/guide.md
index 51d8e418..72d456e7 100644
--- a/content/developer/guide.md
+++ b/content/developer/guide.md
@@ -1136,7 +1136,6 @@ def read():
         write(True)
     else:
         write(False)
-    read()
 
 def write(result):
     if result:
@@ -1147,7 +1146,8 @@ def write(result):
 
 if __name__ == "__main__":
     try:
-        read()
+        while True:
+            read()
     except struct.error:
         pass
 ```