#include <iostream>
#include <cstdlib>
#include <chrono>      //for class chrono
#include <thread>      //for class this_thread
using namespace std;

/*
Each line of output consists of line puffs of smoke followed by rocket.
Thanks to the carriage return (\r), all the lines are printed in the same place.
*/

int main()
{

	const int framesPerSecond {20};
	const int milliseconds {1000 / framesPerSecond};

	cout << "\n";   //Go down to the start of a new line.
	const int numberOfLines {78};

	for (int line {0}; line < numberOfLines; ++line) {

		for (int puff {0}; puff < line; ++puff) {
			cout << ".";        //a puff of smoke
		}
		cout << "==>\r" << flush;   //the rocket

		//Sleep for one tenth of a second.
		this_thread::sleep_for(chrono::milliseconds(100));
	}

	cout << "\n";   //Go down to the start of a new line.
        return EXIT_SUCCESS;
}