In the first class of the course we saw how to print out our initials
as block letters. As a number of people observed, at that time we were able to print the 
block letters only sequentially. Something like

GGGG
G
G GG
G  G
GGGG

IIII
 II
 II
 II
IIII

Here we have a class, Stripe, that we use to build stripes, i.e. sets of lines,
with the block letters. Things like

GGGG  IIII
G      II
G GG   II
G  G   II
GGGG  IIII

The files are, as usual, stripe.h and stripe.cpp, to specify and implement the Stripe
class, and main.cpp to test the class.