From acbb0d4a7f7cbaf3eebc1c4d906a8e440243ba92 Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Wed, 22 Oct 2025 05:42:12 +0000
Subject: [PATCH] feat: Implement Arduino running light sketch

Co-authored-by: makerbackup0821 <makerbackup0821@gmail.com>
---
 arduino_running_light.ino | 42 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 arduino_running_light.ino

diff --git a/arduino_running_light.ino b/arduino_running_light.ino
new file mode 100644
index 0000000..0361ec5
--- /dev/null
+++ b/arduino_running_light.ino
@@ -0,0 +1,42 @@
+/*
+  Arduino 來回跑馬燈程式
+  使用腳位 4~12 實現來回跑馬燈效果
+  每個燈亮 500ms
+*/
+
+// 定義使用的腳位範圍
+const int startPin = 4;
+const int endPin = 12;
+const int totalPins = endPin - startPin + 1; // 總共9個腳位
+
+// 定義延遲時間 (毫秒)
+const int delayTime = 500;
+
+void setup() {
+  // 設置腳位 4~12 為輸出模式
+  for (int pin = startPin; pin <= endPin; pin++) {
+    pinMode(pin, OUTPUT);
+    digitalWrite(pin, LOW); // 初始化所有LED為關閉狀態
+  }
+  
+  // 初始化序列埠用於除錯 (可選)
+  Serial.begin(9600);
+  Serial.println("Arduino 來回跑馬燈啟動");
+}
+
+void loop() {
+  // 正向跑馬燈 (4 -> 12)
+  for (int pin = startPin; pin <= endPin; pin++) {
+    digitalWrite(pin, HIGH);  // 點亮當前LED
+    delay(delayTime);         // 等待500ms
+    digitalWrite(pin, LOW);   // 關閉當前LED
+  }
+  
+  // 反向跑馬燈 (11 -> 5) 
+  // 注意：不包含12和4，避免重複點亮
+  for (int pin = endPin - 1; pin >= startPin + 1; pin--) {
+    digitalWrite(pin, HIGH);  // 點亮當前LED
+    delay(delayTime);         // 等待500ms
+    digitalWrite(pin, LOW);   // 關閉當前LED
+  }
+}
\ No newline at end of file