diff --git a/a.html b/a.html
index 8579018..2ac7a40 100644
--- a/a.html
+++ b/a.html
@@ -14,6 +14,9 @@
         #blue {
             background-color: blue;
         }
+        #white{
+            background-color: white;
+        }
         button {
             border-radius: 5px;
             width: 100px;
@@ -27,6 +30,7 @@
     <button id="green" onclick=setColor('green')>green</button>
     <button id="red"onclick=setColor('red')> red</button>
     <button id="blue"onclick=setColor('blue')>blue</button>
+    <button id="white"onclick=setColor('white')>white</button>
     <button onclick=randomColor()>random</button>
 </body>
 </html>
\ No newline at end of file