lav select

Hvordan kan jeg med PHP generere nedenstående, en select med tider pr. halvetime ml. 9.00 og 23.00?

<select name="fra" onChange="autoGotoSelected(this)">
<option value="" selected="selected">- -</option>
<option value="9.00" <?php if($fra == '9.00') { echo 'selected'; } ?>>9.00</option>
<option value="9.30" <?php if($fra == '9.30') { echo 'selected'; } ?>>9.30</option>
<option value="10.00" <?php if($fra == '10.00') { echo 'selected'; } ?>>10.00</option>
<option value="10.30" <?php if($fra == '10.30') { echo 'selected'; } ?>>10.30</option>
<option value="11.00" <?php if($fra == '11.00') { echo 'selected'; } ?>>11.00</option>
<option value="11.30" <?php if($fra == '11.30') { echo 'selected'; } ?>>11.30</option>
<option value="12.00" <?php if($fra == '12.00') { echo 'selected'; } ?>>12.00</option>
<option value="12.30" <?php if($fra == '12.30') { echo 'selected'; } ?>>12.30</option>
<option value="13.00" <?php if($fra == '13.00') { echo 'selected'; } ?>>13.00</option>
<option value="13.30" <?php if($fra == '13.30') { echo 'selected'; } ?>>13.30</option>
<option value="14.00" <?php if($fra == '14.00') { echo 'selected'; } ?>>14.00</option>
<option value="14.30" <?php if($fra == '14.30') { echo 'selected'; } ?>>14.30</option>
<option value="15.00" <?php if($fra == '15.00') { echo 'selected'; } ?>>15.00</option>
<option value="15.30" <?php if($fra == '15.30') { echo 'selected'; } ?>>15.30</option>
<option value="16.00" <?php if($fra == '16.00') { echo 'selected'; } ?>>16.00</option>
<option value="16.30" <?php if($fra == '16.30') { echo 'selected'; } ?>>16.30</option>
<option value="17.00" <?php if($fra == '17.00') { echo 'selected'; } ?>>17.00</option>
<option value="17.30" <?php if($fra == '17.30') { echo 'selected'; } ?>>17.30</option>
<option value="18.00" <?php if($fra == '18.00') { echo 'selected'; } ?>>18.00</option>
<option value="18.30" <?php if($fra == '18.30') { echo 'selected'; } ?>>18.30</option>
<option value="19.00" <?php if($fra == '19.00') { echo 'selected'; } ?>>19.00</option>
<option value="19.30" <?php if($fra == '19.30') { echo 'selected'; } ?>>19.30</option>
<option value="20.00" <?php if($fra == '20.00') { echo 'selected'; } ?>>20.00</option>
<option value="20.30" <?php if($fra == '20.30') { echo 'selected'; } ?>>20.30</option>
<option value="21.00" <?php if($fra == '21.00') { echo 'selected'; } ?>>21.00</option>
<option value="21.30" <?php if($fra == '21.30') { echo 'selected'; } ?>>21.30</option>
<option value="22.00" <?php if($fra == '22.00') { echo 'selected'; } ?>>22.00</option>
<option value="22.30" <?php if($fra == '22.30') { echo 'selected'; } ?>>22.30</option>
<option value="23.00" <?php if($fra == '23.00') { echo 'selected'; } ?>>23.00</option>
</select>