Hello again. This is a cute project, and would be fun for kids to do. 
If you'd like to get smooth plotting, go to the preference "Batch Pen 
Trails" and turn it on. This will amalgamate all location changes in 
a tick to a composite pen movement.

Preferences can be found in the "Squeak" flap. Get it out and just 
type in "bat" and it will find the preference.

Cheers,

Alan

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At 11:09 AM +0100 3/2/01, Joseph Frippiat wrote:
>Hi,
>
>I upload a small project on Bob's SuperSwiki, it is "jf-tableXY.011.pr".
>
>This is a simulation of an "XY table".  You control the movement with the
>joystick.  The Laser button is used to switch the laser bean on or off.  The
>Clear button clears the laser impacts.  There are 4 proximity switches on
>each axis.  They will be used to limit the movement.
>
>How do I make logical combination like "condition1 OR condition2" in the
>Test part of an TEST/YES/NO unit ?
>
>Thank you
>
>Joseph