296 00:24:57,520 --&amp;gt; 00:25:01,160 and it contains in its guts a little tiny bit 297 00:25:01,160 --&amp;gt; 00:25:05,360 where a current going round like this represents a zero, 298 00:25:05,360 --&amp;gt; 00:25:08,320 and a current going like that represents a one 299 00:25:08,320 --&amp;gt; 00:25:12,240 and a current going both directions at once is zero and one.