diff --git a/1st.cpp b/1st.cpp
index 7c58524..73d70ee 100644
--- a/1st.cpp
+++ b/1st.cpp
@@ -14,3 +14,13 @@ public:
         // 熄滅 LED
     }
 };
+
+class Motor : public Device {
+public:
+    void turnOn() override {
+        // 啟動馬達
+    }
+    void turnOff() override {
+        // 關閉馬達
+    }
+};
\ No newline at end of file