src/main/java/org/teachingextensions/logo/utils/MazeUtils/StdDraw.java
public static void line(double x0, double y0, double x1, double y1)
  {
    offscreen.draw(new Line2D.Double(scaleX(x0), scaleY(y0), scaleX(x1), scaleY(y1)));
    draw();
  }
public static void line(double x0, double y0, double x1, double y1)
  {
    offscreen.draw(new Line2D.Double(scaleX(x0), scaleY(y0), scaleX(x1), scaleY(y1)));
    draw();
  }
Draws a line segment between (<em>x</em><sub>0</sub>, <em>y</em><sub>0</sub>) and
(<em>x</em><sub>1</sub>, <em>y</em><sub>1</sub>).

@param  x0 the <em>x</em>-coordinate of one endpoint
@param  y0 the <em>y</em>-coordinate of one endpoint
@param  x1 the <em>x</em>-coordinate of the other endpoint
@param  y1 the <em>y</em>-coordinate of the other endpoint