 x, val)</a></td>
	<td class="summary">set state of single LED on this arc device.</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#all">all (val)</a></td>
	<td class="summary">set state of all LEDs on this arc device.</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#refresh">refresh ()</a></td>
	<td class="summary">update any dirty quads on this arc device.</td>
	</tr>
	<tr>
	<td class="name" nowrap><a href="#segment">segment (ring, from, to, level)</a></td>
	<td class="summary">create an anti-alia