src/main/java/org/teachingextensions/logo/utils/MazeUtils/StdDraw.java
private static void pixel(double x, double y)
  {
    offscreen.fillRect((int) Math.round(scaleX(x)), (int) Math.round(scaleY(y)), 1, 1);
  }
private static void pixel(double x, double y)
  {
    offscreen.fillRect((int) Math.round(scaleX(x)), (int) Math.round(scaleY(y)), 1, 1);
  }
Draws one pixel at (<em>x</em>, <em>y</em>).
This method is private because pixels depend on the display.
To achieve the same effect, set the pen radius to 0 and call {@code point()}.

@param  x the <em>x</em>-coordinate of the pixel
@param  y the <em>y</em>-coordinate of the pixel