Lesson 0 How to upload code ( sketch ) to arduino board

for uploading sketch to Arduino board .there are 3 mains steps :

1.you need to install "Arduino IDE" .
2.you need to select correct board type .
3.the board needs to be detected by computer. ( com port for windows / cu.usbmodem...for Mac )

below are the video example :

1. for Mac:

for Windows:

if everything going smoothly .you should see "Done Uploading" at then end .and while uploading .the board would flash RX & TX LEDs quickly.