Hi Henrik,

It does not show on my drawing but I have a resistor on each led's anode.

For the scanning part I think I see what you mean and I will play with my code. I presume I should make two subroutines for each led (ON / OFF) and have a the main program call the subroutines based on what's on and what's off.
Now the theory in my head is becoming a little more complex...

Mike