NOOB needs help (7 segment countdown)

Using Arduino LEDs and Multiplexing
26

just did it like this:

void setup()                    //setting up the pins for the segments button and relay
{
  pinMode(Disp1, OUTPUT);
  pinMode(Disp2, OUTPUT);
  pinMode(Disp3, OUTPUT);
  pinMode(segA, OUTPUT);
  pinMode(segB, OUTPUT);
  pinMode(segC, OUTPUT);
  pinMode(segD, OUTPUT);
  pinMode(segE, OUTPUT);
  pinMode(segF, OUTPUT);
  pinMode(segG, OUTPUT);
  pinMode(button, INPUT);
  pinMode(relay, OUTPUT);
}

and

    case 0:
    digitalWrite(segG, LOW);
    digitalWrite(segA, HIGH);
    digitalWrite(segB, HIGH);
    digitalWrite(segC, HIGH);
    digitalWrite(segD, HIGH);
    digitalWrite(segE, HIGH);
    digitalWrite(segF, HIGH);
    break;