#include "makebmp.h"

void square(image & I, int offset, int width, int c)
{ int y0 = offset, y1 = I.height - offset - 1;
  int x0 = offset, x1 = I.width - offset - 1;
  for (int i = 0; i < width; i += 1)
  { for (int j = x0; j <= x1; j += 1)
    { I.at(j, y0) = c;
      I.at(j, y1) = c; }
    for (int j = y0; j <= y1; j += 1)
    { I.at(x0, j) = c;
      I.at(x1, j) = c; }
    y0 += 1;
    y1 -= 1;
    x0 += 1;
    x1 -= 1; } }

int main()
{ image I(100, 100);
  square(I, 0, 4, colour(255, 0, 0));
  square(I, 4, 4, colour(0, 255, 0));
  square(I, 8, 4, colour(0, 0, 255));
  square(I, 32, 4, colour(255, 127, 0));
  square(I, 46, 3, colour(0, 0, 0));
  I.write("x.bmp"); }