Write a color pattern line to blink1.
On mk1 devices, this saves the pattern line to nonvolatile storage. On mk2 devices and above, this only saves to RAM (see savePattern() for nonvol).
blink1 device to command
red part of RGB color
green part of RGB color
blue part of RGB color
pattern line number 0-max_patt (FIXME: put note about this)
-1 on error, 0 on success
See Implementation
Write a color pattern line to blink1.
On mk1 devices, this saves the pattern line to nonvolatile storage. On mk2 devices and above, this only saves to RAM (see savePattern() for nonvol).