 class="comment"> */</span>

<span class="comment">/*</span>
<span class="comment"> *</span>
<span class="comment"> * This example shows how to implement a simple code lock. The code</span>
<span class="comment"> * lock waits for key presses from a numeric keyboard and if the</span>
<span class="comment"> * correct code is entered, the lock is unlocked. There is a maximum</span>
<span class="comment"> * time of one second between each key press, and after the correct</span>
<span class="comment"> * 