Rainbow

Write a Program to draw Rainbow??

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<dos.h>

void main()

{

int gdriver = DETECT,gmode;

int x,y,i;

initgraph(&gdriver,&gmode,"C:\\Turboc3\\BGI");

x=getmaxx()/2;

y=getmaxy()/2;

for(i=30;i<200;i++)

{

delay(100);

setcolor(i/10);

arc(x,y,0,180,i-10);

}

getch();

}

output: