Customize Your Program

[Geeka]

o i created a scientific calculator and i want to customize it.. using code (C+)
Houw can i go about doing that. NB, I know about changing the color background or text as a whole.What if i wanted the word "welcome' in blue, the word"TwoSixEight" in yellow and the word "Scientific" in red

 
cout <<"Welcome to TwoSixEight Geekera Scientific Calculator";

Also can you create a shape or a flag using symbols? Any idea or is it impossible?