Decided in the end to wire up all 10 LEDS in the LED bar graph.
Using the sketch below get the results shown in the video.

int numLed = 10;
int ledpins[] = {
  13,12,11,10,9,8,7,6,5,4};
int mask[] = {
  1,2,4,8,16,32,64,128,256,512};
int counter = 0;
void setup() {             

  // initialize the digital pin as an output.
  for (int i=0;i<numLed;i++){
    pinMode(ledpins[i], OUTPUT);
    digitalWrite(ledpins[i], HIGH);
    delay(250);
  }
}
        

Next step with my Arduino is to set up a binary second counter.
Basic using the LED Bar Graph or six single LEDs to count seconds in binary

/*
Binary Second Counter
 
 Created Alastair Montgomery 22/11/2012
 
 */
int ledPins[] = {
  7,8,9,10,11,12};
int mask[] = {
  1,2,4,8,16,32};
int ledCount = 6;
void setup() {
  for (int thisPin =0; thisPin < ledCount; thisPin++) {
    pinMode(ledPins[thisPin], OUTPUT);
  }
}