quick and dirty throbber inspired by https://twitter.com/dasnuf/status/1206544394251374592 and https://de.wikipedia.org/wiki/Throbber

throbber.c

#include <stdio.h>
#include <unistd.h>

int main( int argc, char *argv[] )
{
    char c = '-';

    printf( "throbber: [-]" );
    while ( 1 )
    {
        switch ( c )
        {
        case '\\':  c = '|';    break;
        case '|':   c = '/';    break;
        case '/':   c = '-';    break;
        case '-':   c = '\\';   break;
        default:    c = '-';    break;
        }
        usleep( 1000 * 150 );
        printf( "\b\b%c]", c );
        fflush( stdout );
    }

    return 0;
}