Project 2.1: Two LEDs Blink

Black wire is connected to the ground port on the Arduino. Green wire is connected to port 5 and the yellow wire to port four. Both resistors are 220 ohms.

https://video.wixstatic.com/video/7670ec_b0cb6d4e7e324696a9ebd506dafd4ad2/480p/mp4/file.mp4