How do i know where the control flows if there is one outer for loop, an inner loop and one while loop?

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C

patterns

Hello everyone, I've been learning C language and I am stuck on a pattern program. Here is the pattern:

        1
      2 3 2
    3 4 5 4 3
  4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5

I'm new to this site so I don't know if the pattern got correctly pasted here. Assuming it did, here is it's code:

#include <stdio.h>
int main()
{
   int i,space,rows,k=0,count=0,count1=0;
   printf("Enter the number of rows: ");
   scanf("%d",&rows);
   for(i=1;i<=rows;++i)   
   {
       for(space=1;space<=rows-i;++space)
       {
          printf("  ");
          ++count;
        }
        while(k!=2*i-1)
        {
           if (count<=rows-1) 
           {
             printf("%d ",(i+k));
             ++count;
           }
           else
           {
             ++count1;
              printf("%d ", (i+k-2*count1)); 
           }
           ++k;
        }
        count1=count=k=0;
        printf("\n");
    }
    return 0;
}

What I understand in this code is if the outer for loop 1 time, the inner loop will execute (rows-i) times. Then what I don't understand is after printing the blank space, how will the value of count change by ++count. And how will the control flow in this code,'cause there is a while loop too.
What I'm assuming is first inner and outer loop will execute. But if it goes that way how will while loop get executed.

I have done the basic patterns. Now I'm stuck on this. Please help me. I will be really grateful. Thank you :)

What I have tried:

I have tried searching the control flow of loops but I didn't find anything helpful which could have helped me in understanding this problem.