You're sending a whole lot of binary control characters to the TTY:

$ perl stor.pl | od -c
0000000 004 004 004   1   2   3   4 004 004 004  \b 003 003  \0  \0  \
+0
0000020  \b 203 004  \0  \0  \0   b   l   u   e  \b 202 005  \0  \0  \
+0
0000040   w   h   i   t   e  \b 201 005  \0  \0  \0   b   l   a   c   
+k
0000060  \n
[download]

Some of those could mean something special to SSH, or to Putty, or to Telnet, and could cause strange output. Best bet is not to echo strange binary characters to a console session, especially if you're using a Telnet or SSH client.