diff --git a/kujibiki.js b/kujibiki.js
index c810881..0d59486 100644
--- a/kujibiki.js
+++ b/kujibiki.js
@@ -2,7 +2,7 @@
   function CountDown() {
     var count = 4,
     tmID,
-    hit = Math.floor(Math.random()*10+1);
+    hit = Math.floor(Math.random()*10);
     areas = document.querySelectorAll("div"),
     button = document.getElementById("start"),
     infobox = document.getElementById("result");
@@ -10,11 +10,8 @@
         if (--count == 0) {
             infobox.innerHTML = "失敗…";
             infobox.setAttribute("class", "failure")
-            for (let i of areas) {
-                if (i.textContent == hit) {
-                    i.removeEventListener("click", stopCountDown, false);
-                }
-            }
+	    areas[hit].removeEventListener("click", stopCountDown, false);
+
         } else {
             infobox.innerHTML = count + "秒前";
             tmID = setTimeout(countDown, 1000);
@@ -23,19 +20,15 @@
     function startCountDown() {
         tmID = setTimeout(countDown, 1000);
         button.removeEventListener("click", startCountDown, false);
-        for (let i of areas) {
-            if (i.textContent == hit) {
-                i.addEventListener("click", stopCountDown, false);
-            }
-        }
+	areas[hit].addEventListener("click", stopCountDown, false);
+	console.log(hit+1+"番だよ");
     }
     function stopCountDown() {
         clearTimeout(tmID);
         infobox.innerHTML = "成功!!";
         infobox.setAttribute("class", "success");
-        areas.removeEventListener("click", stopCountDown, false);
     }
     button.addEventListener("click", startCountDown, false);
   }
   document.addEventListener("DOMContentLoaded", CountDown, false);
-})();
\ No newline at end of file
+})();