This might be quite useful. A key that can be programmed to change colours when turning and enter a colour-dependent phrase when pressed:

while true do
  x=rot.pos()
  i=x/4%8+1
  pressed=sw.get()
  if     i==1 then led.rgb(1.0,0.0,0.0) if pressed then hid.hit("red") end
  elseif i==2 then led.rgb(0.0,1.0,0.0) if pressed then hid.hit("green") end
  elseif i==3 then led.rgb(0.0,0.0,1.0) if pressed then hid.hit("blue") end
  elseif i==4 then led.rgb(1.0,1.0,0.0) if pressed then hid.hit("yellow") end
  elseif i==5 then led.rgb(0.0,1.0,1.0) if pressed then hid.hit("cyan") end
  elseif i==6 then led.rgb(1.0,0.0,1.0) if pressed then hid.hit("purple") end
  elseif i==7 then led.rgb(1.0,0.5,0.5) if pressed then hid.hit("pink") end
  elseif i==8 then led.rgb(1.0,1.0,1.0) if pressed then hid.hit("white") end
  end
  if pressed then
    while sw.get() do end 
  end
end

... of course instead of writing the colour name, one could start applications, enter passwords (not really save though...), etc.