Program:-
#include<iostream.h>
#include<conio.h>
#include<time.h>
#include<dos.h>
#include<stdio.h>
#include<stdlib.h>
#include<graphics.h>
void village();
void trees();
void mountains();
void sun();
void moon();
void design();
int day,x,y;
void main()
{
day=0;
int gdriver=DETECT,gmode;
initgraph(&gdriver,&gmode,"c:\\tc\\bgi");
design();
for(int i=0;i<5;i++)
{
cleardevice();
design();
switch(i)
{
case 0: outtextxy(getmaxx()-100,50,"4 MARCH");break;
case 1: outtextxy(getmaxx()-100,50,"5 MARCH");break;
case 2: outtextxy(getmaxx()-100,50,"5 MARCH");break;
case 3:
case 4: outtextxy(getmaxx()-100,50,"6 MARCH");
outtextxy(50,50,"HAPI BDAY");break;
}
sleep(3);
}
getch();
}
void design()
{
village();
trees();
mountains();
if(day==1)
{
sun();
day=0;
}
else
{
moon();
day=1;
}
}

void village()
{
int tr[6]={100,350,200,350,150,300},tr1[6]={75,350,125,300,175,350};
setcolor(WHITE);
rectangle(10,10,getmaxx()-10,getmaxy()-10);
if(day==1)
setfillstyle(2,1);
else
setfillstyle(2,BLUE);
fillpoly(4,tr1);
if(day==1)
setfillstyle(2,6);
else
setfillstyle(2,BLUE);
fillpoly(3,tr);
int sq[]={115,350,115,400,145,400,145,380,155,380,155,400,185,400,185,350,115,350};
int sq1[]={90,350,90,400,120,400,120,380,130,380,130,400,160,400,160,350,90,350};
if(day==1)
setfillstyle(0,3);
else
setfillstyle(0,BLUE);
fillpoly(8,sq1);
line(220,330,220,400);
if(day==0)
setfillstyle(9,WHITE);
else
setfillstyle(9,0);
sector(220,320,0,360,10,20);
if(day==1)
setfillstyle(9,3);
else
setfillstyle(9,BLUE);
fillpoly(8,sq);
}
void trees()
{
if(day==1)
{
setcolor(BROWN);
setfillstyle(1,BROWN);
}
else
{
setcolor(BLUE);
setfillstyle(1,BLUE);
}
int tree[]={50,330,50,400,60,400,60,330};
fillpoly(4,tree);
if(day==1)
{
setcolor(GREEN);
setfillstyle(9,GREEN);
}
else
{
setcolor(BLUE);
setfillstyle(9,BLUE);
}
sector(55,330,0,360,20,30);
}

void mountains()
{
if(day==1)
{
setcolor(BROWN);
setfillstyle(1,BROWN);
}
else
{
setcolor(BLUE);
setfillstyle(1,BLUE);
}
int mou[]={250,300,300,250,350,300,400,250,450,300,500,250,550,300};
fillpoly(7,mou);
}

void sun()
{
setcolor(4);
setfillstyle(1,4);
sector(200,200,0,360,30,30);
}

void moon()
{
setcolor(WHITE);
setfillstyle(1,WHITE);
sector(200,200,0,360,30,30);
setfillstyle(1,0);
setcolor(0);
sector(180,180,0,360,30,30);
}