I'm new to ruby and programming (although I did dabble in BASIC with my 
Commodore 64 back in the 80's)  I'm running Ruby with Windows XP.  I'm 
having a problem when I run this simple program:

puts 'Hello, world!'
puts ' '
puts 'Good-bye'

When I run the program, a window appears that says "Hello, world!  Good-Buy" 
and then the window immediately disappears.  How do I get that window to 
stay open after it has run the program?

Thanks for your help,

Steve