diff --git a/bom.js b/bom.js
deleted file mode 100644
index 9f70fd6..0000000
--- a/bom.js
+++ /dev/null
@@ -1,25 +0,0 @@
-(() => {
-      function CountDown() {
-        var count = 4, tmID, infobox = document.getElementById("start");
-        function countDown() {
-    if (--count == 0) {
-    	    infobox.innerHTML = "失敗";
-    	} else {
-    	    infobox.innerHTML = count + "秒前";
-    	    tmID = setTimeout(countDown, 1000);
-    	}
-        }
-        function startCountDown() {
-    	tmID = setTimeout(countDown, 1000);
-    	infobox.removeEventListener("click", startCountDown, false);
-    	infobox.addEventListener("click", stopCountDown, false);
-        }
-      function stopCountDown() {
-            clearTimeout(tmID);
-            infobox.innerHTML = "成功!!";
-            infobox.setAttribute("class", "success");
-        }
-        infobox.addEventListener("click", startCountDown, false);
-      }
-      document.addEventListener("DOMContentLoaded", CountDown, false);
-    })();
diff --git a/bomb.js b/bomb.js
new file mode 100644
index 0000000..9f70fd6
--- /dev/null
+++ b/bomb.js
@@ -0,0 +1,25 @@
+(() => {
+      function CountDown() {
+        var count = 4, tmID, infobox = document.getElementById("start");
+        function countDown() {
+    if (--count == 0) {
+    	    infobox.innerHTML = "失敗";
+    	} else {
+    	    infobox.innerHTML = count + "秒前";
+    	    tmID = setTimeout(countDown, 1000);
+    	}
+        }
+        function startCountDown() {
+    	tmID = setTimeout(countDown, 1000);
+    	infobox.removeEventListener("click", startCountDown, false);
+    	infobox.addEventListener("click", stopCountDown, false);
+        }
+      function stopCountDown() {
+            clearTimeout(tmID);
+            infobox.innerHTML = "成功!!";
+            infobox.setAttribute("class", "success");
+        }
+        infobox.addEventListener("click", startCountDown, false);
+      }
+      document.addEventListener("DOMContentLoaded", CountDown, false);
+    })();