#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11113672
use warnings;
use Tk;

my %frames;

my $mw = MainWindow->new( -bg=> '#606060', -borderwidth=> 0);
for my $j ( 0 .. 15 )
  {
  for my $i ( 0 .. 15 )
    {
    $frames{"$i,$j"} = $mw->Button(
      -text => ' ',
      -bg => "#60C8BC",
      -fg => "#000000",
      -borderwidth => 1,
      -anchor => 'w', 
      -command => sub { ToggleBox("$i,$j"); },
      )->grid( -row => $j, -column => $i);
    }
  }

MainLoop;

sub ToggleBox 
  {
  my $this = shift;
  print "$this\n";
  }