I have edited the message, improved readability, and corrected the negative value flaw; the only trouble is that it warns if there's a non-integer argument :(. I don't know how to correct this. 
#!/usr/bin/perl
use warnings;
use strict;
print "Welcome to blob maker V1.2\n";

print("Input your blob's height: ");
chomp(my $height=<STDIN>);
$height=int($height);
die("Invalid argument.\n") if ($height < 1);

print("Input your blob's width: ");
chomp(my $width=<STDIN>);
$width=int($width);
die("Invalid argument.\n") if($width < 1);

print("Input blob message: ");
chomp(my $msg=<STDIN>);
print("\n");

while ($height > 0 ){
print("$msg" x $width . "\n");
--$height;
}

[download]

In reply to Re: Blob Maker by Anonymous Monk
in thread Blob Maker by legolas

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.