diff --git a/projects/Countdown_timer/main.py b/projects/Countdown_timer/main.py
index 06c48e22c..f10643407 100644
--- a/projects/Countdown_timer/main.py
+++ b/projects/Countdown_timer/main.py
@@ -1,15 +1,22 @@
 import time
 
 def countdown(t):
- while t:
- mins, secs = divmod(t, 60)
- timer = '{:02d}:{:02d}'.format(mins,secs)
- print(timer, end="\r")
- time.sleep(1)
- t -= 1
+ while int(t):
+ if t> 10: # more than 10 seconds
+ mins, secs = divmod(t, 60)
+ timer = '{:02d}:{:02d}'.format(mins,secs)
+ print(timer, end="\r")
+ time.sleep(1)
+ t -= 1
+ else: # less than 10 seconds
+ secs, ms = divmod(t * 100, 100)
+ timer = '{:02d}:{:02d}:{:02d}'.format(0, int(secs), int(ms))
+ print(timer, end="\r")
+ time.sleep(0.01)
+ t -= 0.01
 
 print('Timer completed!')
 
-t = input('Enter the time in seconds: ')
+t = int(input('Enter the time in seconds: '))
 
-countdown(int(t))
\ No newline at end of file
+countdown(int)
\ No newline at end of file
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/Python-World/python-mini-projects/pull/592.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/Python-World/python-mini-projects/pull/592.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>