Random number display on 7-segment LED

Blink_7seg.ino

/*
Show random numbers on a 7-segment display
from WDT based entropy source
https://github.com/taoyuan/Entropy
*/
#include <Entropy.h>
byte leds[] = {2,3,4,5,14,15,16,17};
//#define leds one
byte one[] = {0,6};
byte two[] = {2,7,6,4,3};
byte three[] = {2,7,6,4,0};
byte four[] = {5,4,6,0};
byte five[] = {7,5,4,0,2};
byte six[] = {7,5,4,3,2,0};
byte seven[] = {7,6,0};
byte eight[] = {0,2,3,4,5,6,7};
byte nine[] = {7,6,5,4,0,2};
byte zero[] = {0,2,3,5,7,6,1};

byte* nums[] = {zero,one,two,three,four,
                five,six,seven,eight,
                nine};
byte numsize[] = {7,2,5,5,4,5,6,3,7,6};
byte ii = 0;
byte num_in = 0;
// the setup routine runs once when you press reset:
void setup() {
  Serial.begin(9600);
  Entropy.initialize();                
  // initialize the digital pin as an output.
  for(byte i=0;i<8;i++)
  {
    pinMode(leds[i], OUTPUT);
  }
  //Do display test
  for(ii=0;ii<sizeof(leds);ii++)
  {
    digitalWrite(leds[ii], HIGH);   // turn the LEDs off
  }
  delay(1000);
  for(ii=0;ii<sizeof(leds);ii++)
  {
    digitalWrite(leds[ii], LOW);   // turn the LEDs off
  }
}



// the loop routine runs over and over again forever:
void loop() {
  num_in = Entropy.random(0,9);
  byte* curnum = nums[num_in];
  byte size_n = numsize[num_in]; 
  for(ii=0;ii<size_n;ii++)
  {
    digitalWrite(leds[nums[num_in][ii]], HIGH);   // turn the LED on 
  }
  delay(1000);
  for(ii=0;ii<sizeof(leds);ii++)
  {
    digitalWrite(leds[ii], LOW);   // turn the LEDs off
  }
  delay(1000);
}