package cz.czechitas.beginnerjava.homework.practice;

import org.teachingextensions.logo.Turtle;

public class Spiral {
	public static void main(String[] args) {
		Spiral myApp = new Spiral();
		myApp.run();
	}

	Turtle turtle = new Turtle();

	public void run() {
		turtle.show();
		turtle.setSpeed(10);


		/*
		 * 1.i - 5
		 * 2.i - 5 + 10
		 * 3.i - 5 + 20
		 * 4.i - (5 + 30)
		 * y.1 - x
		 * x = initial length +??
		 * (5+30), (5+20), (5+10) = X
		 * y i  = x / 10 - 5 / 10 + 1
		 * 10 y = x -5 + 10
		 * x = 10y + 5 -10
		 * 5 = initial length
		 * 10 = addition to each length
		 */


		int initialLength = 5;
		int addition = 5;
		for (int i = 1; i < 50; i++) {
			turtle.move((addition * i) + (initialLength - addition));
			turtle.turn(90);
		}

	}
}