Console tricks

Global blocks As Long 
Global block As Long
Global curPBVal As Long

Con.Write "["
for block = 0 to blocks
  'do stuff
  progressCallBack
next
Con.Write "]"

Sub progressCallBack()
    On Error Resume Next
    Dim curOf20 As Long
    
    'we display progress scale 1-20
     curOf20 = (20 * block) / blocks
     If curOf20 > curPBVal Then
        Con.WriteLine String(curOf20 - curPBVal, "-"), False
        curPBVal = curOf20
     End If
  
End Sub

printf("Percent Complete:    ");

for(i=opts.offset; i < opts.size ; i++){
   if(i%10==0){
      int pcent = (100*i)/opts.size;
      printf("\b\b\b%02d%%", pcent);
      fflush(stdout);
   }
}

void
spinner(int spin_seconds) {
    static char const spin_chars[] = "/-\|";
    unsigned long i, num_iterations = (spin_seconds * 10);
    for (i=0; i<num_iterations; ++i) {
        putchar(spin_chars[i % sizeof(spin_chars)]);
        fflush(stdout);
        usleep(100000);
        putchar('\b');
    }
}