Arduboy custom bootloader RGB LED + boot key test

Customized bootloader for Arduboy featuring:
7.5 second timeout where the RGB LED breathes Red, Green , Blue and off 3 times.
Wanna have a try? grab it from here:
mrblinky.net/ar...
Double MAGIC KEY check (0x0800 and RAMEND-1 check) + 0xDCFB boot signature to enter bootloader mode from opening and closing USB port at 1200 baud.
Pressing DOWN button in bootloader mode will hold the bootloader timeout period for as long as the button is held down.
Pressing DOWN while turing on Arduboy put’s it in bootloader mode instead of running the sketch.