Now it's getting a little more advanced on the Matrix LED. You should understand the basics from first two lessons.
File: DotLightShow.py
# show help
$ sudo python ./DotLightShow.py -h
# execute with default
$ sudo python ./DotLightShow.py
# execute with min parameters
$ sudo python ./DotLightShow.py -d 1 -n 1
# execute with max parameters
$ sudo python ./DotLightShow.py -d 59 -n 89
File: TwoTextScroller.py
# show help
$ sudo python ./TwoTextScroller.py -h
# execute with default
$ sudo python ./TwoTextScroller.py
# execute with min parameters
$ sudo python ./TwoTextScroller.py --text_a 'lorem ipsum' --text_b 'dolor sit amet'