use constant STEPS_IN_MILE => 2000; # rough estimate based on www.thewalkingsite.com/10000steps.html

my $step_counter = 0; # I'll presume you are just starting out...
my $current_state = 'walking'; # but you are trying!

while ($current_state eq 'walking')
{
    $step_counter++;
    $step_counter++ if ( $step_counter/STEPS_IN_MILE > 500 ); # don't you think you've dawdled long enough?  Pick up the pace! (more of a jog at this point)
    $current_state = 'fallen down' if ( $step_counter/STEPS_IN_MILE > 1000 ); # do ring the gong before falling, the kind Monks will surely fetch you water.
}