RE: Stair Mats

["Bricknell, Tony" <tony.bricknell@xxxxxxx>]

What if someone starts walking down the stairs, about turns, and goes
back
up...?

<distant sound of me running quickly away> 

-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 15 October, 2002 11:33
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Stair Mats


Tony,

EXACTLY! That's the problem I'd been thinking of. It's more complex
still,
since a 2-stepper might not ALWAY 2-step. 

I guess I need _4_ mats, and depending on the order they're pressed in,
I
can work out what's happening:

1,2,3,4 - UP
1,2,3 - UP
1,2,4 - UP
1,3 - UP
1,3,4 - UP
2,3,4 - UP
2,3 - UP
2,4 - UP

4,3,2,1 - DOWN
4,3,1 - DOWN
4,2,1 - DOWN
4,2 - DOWN
3,2,1 - DOWN
3,2 - DOWN
3,1 - DOWN

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