[[... light-emitting diode display ...]]



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[David Wijnants] writes, "http://www.xs4all.nl/~arjenvm/pics/index.html has lots of icons 'n stuff,
including red and green 'bullets'. Just stick a .GIF image on a canvas, or
in a label, and switch images when you need to - for example :

      image create photo red -file smb_red.gif
      image create photo green -file smb_green.gif
      pack [ label .led -image red -height 50 -width 50 ]
      pack [ button .red -text Rood -command { .led configure -image red } ]
-fill x
      pack [ button .green -text Groen -command { .led configure -image green } ]
-fill x







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With [Mark G. Saye]'s package [http://www.speakeasy.org/~msaye/tcl/led/],
"you can
create leds (labels) with different sizes and colors, and you can flash
them (toggle bg/fg colors and normal/active states), disable (and
resume) flashing. There's even a demo for Knight Rider fans."