#include <iostream>
#include <cstdlib>
#include <chrono>      //for the function chrono::milliseconds
#include <thread>      //for the function this_thread::sleep_for
using namespace std;

int main()
{
        char a[70];
        const size_t n {size(a)};   //the number of elements in the array

        //Fill up the array with spaces.
        for (int i {0}; i < n; ++i) {
               a[i] = ' ';
        }

	cout << "\033[2J"; //Clear the screen.
	cout << "\033[H";  //Home the cursor.

	//During each iteration of this loop, the ++i makes us
	//redraw the rocket one character farther to the right.

        for (int i {0}; i < n-3; ++i) {
                a[i + 0] = '.';        //trailing puff of smoke
                a[i + 1] = '=';
                a[i + 2] = '=';
                a[i + 3] = '>';        //the nose cone


                //Output the array onto the screen.
                for (int j{0}; j < n; ++j) {
                        cout << a[j];
                }

		//Flush the output buffer for smoother animation.
		cout << "\r" << flush;

		//Sleep for 250 milliseconds (a quarter of a second).
		this_thread::sleep_for(chrono::milliseconds(250));
        }

	cout << "\n";   //Go down one line.
	cout << "BOOM!\n";
        return EXIT_SUCCESS;
}