pythagoreantree/src/DrawingTools.java

import ch.aplu.turtle.Turtle;

/**
 * Created by Christian on 10.02.2015.
 */
public class DrawingTools {
    public static void drawSquare(Turtle turtle, double size) {
        int width = (int) size / 10;
        turtle.penWidth(width);
        for (int i = 0; i < 4; i++) {
            turtle.forward(size).left(90);
        }
    }
}