Andy,

I think I see your point, so what you are saying is that if I changed:

ACC =1;
Blink_func (); /* blink at a 0.5 second interval */

to :

Delay_time =1;
Blink_func (); /* blink at a 0.5 second interval */

where Delay_time is a defined variable, then the program would be correct?

Jacob