opaa

#include <graphics.h>
#include <math.h>

int main(){
  int gd = DETECT, gm;
  initgraph(&gd, &gm, "c:\turboc3\bgi");
  initwindow(1024, 640);

  // get center:
  int midX = getmaxx() / 2;
  int midY = getmaxy() / 2;

  // radius and variabls:
  int radius = 280;
  float x_alias, y_alias;
  float rad2deg = 3.14159 / 180;

  //border and center:
  setcolor(LIGHTGRAY);
  circle(midX, midY, radius);
  line(midX, (midY - radius), midX, (midY + radius ));
  line((midX - radius), midY, (midX + radius), midY);

  // 16 circles arround circle:
  int circles16 = 16;
    for(int i = 0; i < circles16; i++){
      x_alias = midX + (cos((i * (360 / circles16)) * rad2deg) * radius);
      y_alias = midY + (sin((i * (360 / circles16)) * rad2deg) * radius);
      circle(x_alias, y_alias, 30);
  }

  //before last:
  ellipse(midX, midY, 0, 360, 20, 80);
  ellipse(midX, midY, 0, 360, 80, 20);

  //8 circles arrounded 8 circles arround center circle:
  int circles08 = 8;
  for(int i = 0; i < circles08; i++){
    x_alias = midX + (cos((i * (360 / circles08)) * rad2deg) * (radius * 0.4));
    y_alias = midY + (sin((i * (360 / circles08)) * rad2deg) * (radius * 0.4));
    circle(x_alias, y_alias, 25);
    circle(x_alias, y_alias, 35);
  }

  //center circle:
  ellipse(midX, midY, 0, 360, 40, 40);

  getch();
  closegraph();
  return 0;
}