update button name

index.html

@@ -30,7 +30,7 @@
         <p>mess with the random walkers</p>
         <ul>
           <li><button id="button-create-walker">create one</button></li>
-          <li><button id="button-destroy-walker">kill the last one :(</button></li>
+          <li><button id="button-destroy-walker">kill one :(</button></li>
           <li><button id="button-reset-walkers">kill them all D:</button></li>
         </ul>
         <p>if you want, you can <button id="button-hide-page">hide</button> the page to just watch the random walk</p>