Structure of Diamond using Computer Graphics in C Language

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
int gd=DETECT,gm,midx,midy,i,j;
initgraph(&gd,&gm,"C:\TurboC3\BGI");
midx=getmaxx()/2;midy=getmaxy()/2;

/*rectangle(20,450,170,300);
rectangle(60,400,210,250);
rectangle(100,350,250,200);
line(20,450,100,350);
line(20,300,100,200);
line(170,450,250,350);
line(170,300,250,200);

rectangle(170,450,320,300);
rectangle(210,400,360,250);
rectangle(250,350,400,200);
line(320,450,400,350);
line(320,300,400,200);

rectangle(20,300,170,150);
rectangle(60,250,210,100);
rectangle(100,200,250,50);
line(20,150,100,50);
line(170,150,250,50);

rectangle(170,300,320,150);
rectangle(210,250,360,100);
rectangle(250,200,400,50);
line(320,150,400,50);

for(i=0;i<=300;i=i+150)
for(j=0;j<=300;j=j+150)
{
fillellipse(20+i,450-j,5,5);
fillellipse(60+i,400-j,5,5);
fillellipse(100+i,350-j,5,5);
}
getch();
setcolor(BLUE);
line(20,450,210,250);
line(60,400,170,300);
line(20,300,210,400);
line(170,450,60,250);

line(210,400,400,200);
line(250,350,360,250);
line(210,250,400,350);
line(250,200,360,400);

line(170,300,360,100);
line(210,250,320,150);
line(170,150,360,250);
line(210,100,320,300);

line(60,250,250,50);
line(100,200,210,100);
line(60,100,250,200);
line(100,50,210,250);

getch();

*/
rectangle(20,450,320,150);
rectangle(100,350,400,50);
line(20,450,100,350);
line(320,450,400,350);
line(20,150,100,50);
line(320,150,400,50);

setcolor(YELLOW);
setfillstyle(1,YELLOW);
fillellipse(115,350,10,10);
fillellipse(305,300,10,10);
fillellipse(265,200,10,10);
fillellipse(155,150,10,10);

line(115,350,20,450);
line(115,350,170,300);
line(115,350,210,400);
line(115,350,60,250);

line(305,300,210,400);
line(305,300,400,350);
line(305,300,360,250);
line(305,300,250,200);

line(155,150,60,250);
line(155,150,100,50);
line(155,150,250,200);
line(155,150,210,100);

line(265,200,320,150);
line(265,200,360,250);
line(265,200,210,100);
line(265,200,170,300);

setcolor(MAGENTA);
setfillstyle(1,MAGENTA);
fillellipse(20,450,7,7);
fillellipse(210,400,7,7);
fillellipse(170,300,7,7);
fillellipse(60,250,7,7);

fillellipse(400,350,7,7);
fillellipse(360,250,7,7);
fillellipse(250,200,7,7);

fillellipse(100,50,7,7);
fillellipse(210,100,7,7);

fillellipse(320,150,7,7);

getch();
closegraph();
}