You may find that your MEGA2560 R3 board's 'L' LED already blinks when you
connect it to a USB plug. This is because the boards are generally shipped with the
'Blink' sketch pre-installed.
In this lesson, we will reprogram the MEGA2560 R3 board with our own Blink sketch
and then change the rate at which it blinks.
In Lesson 0, you set up your Arduino IDE and made sure that you could find the right
serial port for it to connect to your MEGA2560 R3 board. The time has now come to
put that connection to the test and program your MEGA2560 R3 board.
The Arduino IDE includes a large collection of example sketches that you can load
up and use. This includes an example sketch for making the 'L' LED blink.
Load the 'Blink' sketch that you will find in the IDE's menu system under File >
Examples > 01.Basics
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