Countdown example does not clear the screen before displaying the next number.

[ElectronicRescue]

On a single 32 x 16 P10 panel this example works (accidentally).

However, if you change the program a little:

• remove the ellipsis (...)
• remove the leading space
• add more panels
• change the font

then the program breaks and does not display as you would expect.

It is easy to replicate by changing any one of the points above.

[ElectronicRescue]

This has been addressed in a pull request. #41