GUI Fest Post Challenge: Multiple Counters

The "Multiple Counter" program shows a counter which can be incremented manually or periodically. The counter can at any time be copied, giving a new counter with its own independent state, which is copied from the old counter in the very moment of creation. A counter can also be linked, giving a new view to the same counter. One can think of the copying and linking as being analogous to ln and cp applied to files under Unix.

A counter view looks something like this:

+------------+
|            |
| +--------+ |
| |    0   | |
| +--------+ |
|            |
|            |
| +--------+ |
| | Manual | |
| +--------+ |
|            |
| +--------+ |
| |  Auto  | |
| +--------+ |
|            |
| +--------+ |
| |  Copy  | |
| +--------+ |
|            |
| +--------+ |
| |  Link  | |
| +--------+ |
+------------+

It contains the following elements:

an integer display of the current count.
Manual, a button which increments this counter and all those linked with it.
Auto, a button which sets this counter (and all its associated links) to auto-increment mode in which the count increases periodically until Manual is pressed. The button may visually reflect if the counter is in auto-increment mode or not.
Copy, a button which makes a copy of this counter. The new counter starts with the same value as the counter that created it, but is not linked to it (ie. pressing Manual in it does not increase the count in the one that created it, and vice-versa).
Link, a button which makes a link to this counter. The link is a new view of the same count, ie. it increases when other counters linked to it increase, and vice-versa.

If possible, it should be possible to distinguish counters that are linked - eg. links have the same background colour or window title, copies have a different colour or title, or perhaps by layout - links placed across the screen, copies placed down the screen.