//calculate the triangular number of a value
// display the triangular value in playpen.

#include <iostream>
#include "playpen.h"

int main()
{
        int const value(10);
        int n=1;
        int sum(0);
        int count(1);
        int y(0);
        int color(0);

        fgw::playpen paper;
        int number(0);
        int control = value;
        while (control > 0) {
                sum+=n;

                std::cout << "The triangular number of " << count << " is " << sum << '\n';

                paper.scale(15);
                number = n;
                for (int i(1); i <= number; ++i) {
                        paper.plot(number,y,(number%2==0)?color=7:color=32);
                        for (int aline(0); aline != number; ++aline) {

                                paper.plot(number, aline, (number % 2 == 0)? color = 7:color = 32);

                        }
                        paper.display();
                }
                ++y;
                ++n;
                ++count;
                --control;
                std::cout << "Press enter See the next value " << '\n';
                std::cin.get();
        }
        std::cin.get();
}