PolygonFlower.java

public class PolygonFlower {

  public static void main(String[] args) {
    Turtle dan = new Turtle();
   dan.penup();
   dan.left(90);
   dan.forward(200);
   dan.right(90);
   dan.pendown();
    dan.delay(10); // make the turtle faster (0 = fastest)
    flower(dan, 7, 15, 50);
  }

  public static void polygon(Turtle t, int numSides, double length) {
  	for (int i = 0; i < numSides; i++) {
  		t.forward(length);
  		t.left(360.0 / numSides);
  	}
  }


  public static void petal(Turtle t, int numLayers, double length) {
  	for (int i = 0; i < numLayers; i++) {
  		polygon(t, i + 3, length);
  	}
  }


  public static void flower(Turtle t, int numPetals, int numLayers, double length) {
  	for (int i = 0; i < numPetals; i++) {
  		petal(t, numLayers, length);
  		t.forward(length);
  		t.right(360.0 / numPetals);
  	}
  }

}