C language string "loading"

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C

Ubuntu

Hello everybody...
I have a program doing a job
I want to wait a little bit to do something(do not care about it) and at the same time I want to print something with a delay,but It doesn't work as I expected.

Code(a part of it):

What I have tried:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>


void delay(int number_of_seconds) ;
void Loading();

int main(void)
{
    Loading();
}


void delay(int number_of_seconds) 
{ 
    // Converting time into milli_seconds 
    int milli_seconds = 1000 * number_of_seconds; 
  
    // Storing start time 
    clock_t start_time = clock(); 
  
    // looping till required time is not achieved 
    while (clock() < start_time + milli_seconds); 
} 

void Loading()
{
    char *array[4] = {"/" , "--" , "\\" , "|"};
    
    for(int j = 1; j <= 8; j++)
    {
        for(int i = 0; i <= 3; i++)
        {
            printf("%s" , array[i]);
            delay(100);
            printf("\b");
            printf(" ");
            delay(100);
            printf("\b");
        }
    }
}

I want to print "/" and after a delay of 0,1 sec. to print the next one string of the array at the same position(I use backslash + b to do it).
The problem is that in the output after some seconds I receive this: "--------"
Thanks!!!