求助 C语言图形问题

我想画一排点 让点像流水灯式的出现
但是这个程序是一下子全出来
各位给个意见

#include<graphics.h>
#include<conio.h>
#include"dos.h"
#include"stdio.h"
main()
{
int h,i,j;
char ch;
int graphdriver,graphmode;
graphdriver=VGA;
graphmode=VGAHI;
initgraph(&graphdriver,&graphmode,"");
for(i = 100,j = 100;i<500;i+=10)
{
putpixel(i,j,4);
for(h=0;h<10000;h++);
putpixel(i,j+100,4);

}
getch();
closegraph();
}
那个延时我们也加了 但是加上就不动了 也不知道问什么

#include<graphics.h>
#include<conio.h>
#include"dos.h"
#include"stdio.h"
main()
{
int h,i,j;
char ch;
int graphdriver,graphmode;
graphdriver=VGA;
graphmode=VGAHI;
initgraph(&graphdriver,&graphmode,"");
for(i = 100,j = 100;i<500;i+=10)
{
putpixel(i,j,4);
for(h=0;h<10000;h++)h*h;
putpixel(i,j+100,4);

}
getch();
closegraph();
}

#include<graphics.h>
#include<conio.h>
#include"dos.h"
#include"stdio.h"
main()
{
int h,i,j;
char ch;
int graphdriver,graphmode;
graphdriver=VGA;
graphmode=VGAHI;
initgraph(&graphdriver,&graphmode,"");
for(i = 100,j = 100;i<500;i+=10)
{
putpixel(i,j,4);
delay(15000); /*添加延时*/
putpixel(i,j+100,4);

}
getch();
closegraph();