To program the Arduino, you need to click See Inside, open the ATmega328P sprite, and add blocks under 'setup' and 'loop'. By default, the 'heartbeat' program is installed. There is a Serial Monitor, but the Arduino Board cannot access it yet. If you want to write to the Serial Monitor, then you need to write each character to the MSG_STR list individually and set SER_LATCH to HIGH.
I got the Arduino graphic online. The programming was done by me. I plan to add A 'serialWrite' block to the ATmega sprite. By doing this, the Arduino will be able to write to the Serial Monitor a lot more easily.
