There is no need for interrupts for what you want to do.
What I would do is as follows:
delete all the calls to delay (bad practice if you want some real time activity) and replace them with time conditional firing. Like in the code fragment below.
#define DELAY 220
void TimedAction()
{ static long LastActionTime=0;
if( (LastActionTime + DELAY) > millis() )
{
LastActionTime=millis();
//do something time based
}
}
Best regards
Jantje