Green Flash Mode

Usage:	Used as a visual verification that a good read has occurred.
Definition:	An array of green LEDs in the front of the Imager can be programmed to flash in response to user-defined conditions.
Serial Cmd:	<K750,green flash mode,target pattern status,green flash duration>
Default:	Good Read
Options:	0 = Disabled 1 = Good Read 2 = Static Presentation 3 = Match 4 = Mismatch 5 = Strobe