Best program for Birthday in C++ also source code

#include<windows.h>
#include<iostream>
#include <mmsystem.h>
using namespace std;

int main()
{

int a;
int i;
char h = 3;
cout << "\t\t\tTo : Name\n\n\a";
Sleep(1000);
cout << "\t\t";
for (i = 0; i<42; i++)
cout << "_";
cout << "\n\n\a";

Sleep(1000);
cout << "\t\t\t\ti i i i i\n\a\a";

Sleep(1000);
cout << "\t\t\t\ti i i i i\n\a\a\a";

Sleep(1000);
cout << "\t\t\t __i_i_i_i_i__\n\a";

Sleep(1000);
cout << "\t\t\t |" << h << " " << h << "|\n\a";

Sleep(1000);
cout << "\t\t\t __| " << h << " date " << h << " |__\n\a";

Sleep(1000);
cout << "\t\t\t | " << h << " " << h << " " << h << " " << h << " |\n\a";

Sleep(1000);
cout << "\t\t\t__|" << h << " HAPPY " << h << " " << h << "|__\n\a";

Sleep(1000);
cout << "\t\t | " << h << " " << h << " BIRTHDAY " << h << " |\n\a";

Sleep(1000);
cout << "\t\t |" << h << " " << h << " " << h << " " << h << " " << h << " " << h << "|\n\a";

Sleep(1000);
cout << "\t\t | " << h << " " << h << " " << h << " " << h << "Name" << h << " " << h << " " << h << " " << h << " |\n\a";

Sleep(1000);
cout << "\t\t |_________________________|\n\a";

cout << "\n\n\n\n\n";
cout << "please press A and enter please :) :)\a";
cout << "once again \a";
cin >> a;

cout << endl;
Sleep(1000);
cout << "\t\t\a";
for (i = 0; i<42; i++)
cout << "_\a";
cout << "\n\n\a";

Sleep(1000);
cout << "\t\t\t\ti i i i i\n\a";

Sleep(1000);
cout << "\t\t\t\ti i i i i\n\a";

Sleep(1000);
cout << "\t\t\t __i_i_i_i_i__\n\a";

Sleep(1000);
cout << "\t\t\t |" << h << " " << h << "|\n\a";

Sleep(1000);
cout << "\t\t\t __| " << h << " dd/mm " << h << " |__\n\a";

Sleep(1000);
cout << "\t\t\t | " << h << " " << h << " " << h << " " << h << " |\n\a";

Sleep(1000);
cout << "\t\t\t__|" << h << " HAPPY " << h << " " << h << "|__\n\a";

Sleep(1000);
cout << "\t\t | " << h << " " << h << " BIRTHDAY " << h << " |\n\a";

Sleep(1000);
cout << "\t\t |" << h << " " << h << " " << h << " " << h << " " << h << " " << h << "|\n\a";

Sleep(1000);
cout << "\t\t | " << h << " " << h << " " << h << " " << h << "Name" << h << " " << h << " " << h << " " << h << " |\n\a";

Sleep(1000);
cout << "\t\t |_________________________|\n\a";
for (int a = 1; a < 50; a++)
{
cout << "Happy Birthday dear" << endl << endl;
Sleep(100);
}
system("pause");
return 0;
}