Scroll Phat - Scroll Text

Hi,

Having a bit of bother getting the simple text example working.

It compiles and runs fine but no text on the Phat, the shell shows the following:
python simple-text-scroll.py "message" press CTRL-C to exit

The Phat works fine with all the other examples but i cant figure this one out.
Im am guessing that the required text goes in the speak marks as shown below?

Any help appreciated:

import scrollphat
import sys
import time

if len(sys.argv) != 2:
        print("\nusage: python simple-text-scroll.py \"message\" \npress CTRL-C to exit\n")
        sys.exit(0)

scrollphat.write_string(sys.argv[1] + "HELLO WORLD ")

while True:
        scrollphat.scroll()
        time.sleep(0.1)