diff --git a/203-node-mixed/src/public/images/use-case-async-http.png b/203-node-mixed/src/public/images/use-case-async-http.png
deleted file mode 100644
index 9c35ce6..0000000
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diff --git a/203-node-mixed/src/public/images/use-case-async.png b/203-node-mixed/src/public/images/use-case-async.png
deleted file mode 100644
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diff --git a/203-node-mixed/src/slides.md b/203-node-mixed/src/slides.md
index 150d12c..b1913e4 100644
--- a/203-node-mixed/src/slides.md
+++ b/203-node-mixed/src/slides.md
@@ -81,8 +81,8 @@ hideInToc: true
 
 ---
 title: Tricky Part of Async Function
-layout: image-right
-image: images/use-case-async.png
+layout: iframe-right
+url: https://embeds.onemodel.app/d/iframe/aiOvN37uC1OEIrKh6yGADkuuyLPuaGFG4bc4OTl6TrL3h10zvCt2MbG020YB
 ---
 
 ## Tricky Part of Async Func
@@ -108,8 +108,8 @@ image: images/use-case-async.png
 
 ---
 title: HTTP Comes to the Rescue
-layout: image-right
-image: images/use-case-async-http.png
+layout: iframe-right
+url: https://embeds.onemodel.app/d/iframe/QDvoHGiYvG9o2SjZB7bP0VJ63fT2UfM4ovw7jhWX2VA2rSwgUJ4MuwKA2TRQ
 ---
 
 ## HTTP Comes to the Rescue