/**
  \example timer4.cpp

  Although combining red, green, and blue light should theoretically
  produce white, on the IXM turning on all three of the RGB LEDs
  produces a rather pinkish-purplish white, because the red LED is
  relatively quite strong and the green LED relatively weak.

  This final example sketch uses split times to 'pulse width modulate'
  the RGB pins, toning down the red and blue to produce a more
  balanced white.
  
  In addition, it demonstrates the getSketchIndex() method, which
  allows a split timer handler to identify which split time index is
  currently being handled.  In this example, it allows a single
  handler to be used to turn off each LED after its allotted fraction
  of a lap.

  Even though the LEDs are actually flickering madly, the resulting
  visual appearance is of a single steady color, because this timer is
  running at 100Hz per lap.  All we see, with our slow eyes, is the
  1Hz blinky period.

*/
