INTRODUCTION 
You have already made your first experience drawing with the turtle on the computer. However, the turtle has its limits and so now you will get to know more flexible options of creating graphics output. 
OPENING THE GRAPHIC WINDOW 
The library (respectively the window for the graphics output) is called GPanel. This library is already installed in TigerJython but you must still specify that you want to use the GPanel and therefore start your program with an import. Then you can use makeGPanel() to create a new graphics window: from gpanel import * makeGPanel(3, 7, 4, 6) So far, the program does not do anything very exciting as it only shows a blank window that you can then close again. Your GPanel window is always square and uses an xycoordinate system, as you should know from mathematics: In this example you specify the x and ycoordinate range with the four numbers 3, 7, 4, and 6. 3 is the xcoordinate on the left edge, 7 is the xcoordinate on the right edge, 4 is the ycoordinate on the bottom edge and 6 is the ycoordinate on the top edge. 
MEMO 
You can create a window with makeGPanel().
You can define the desired area of the coordinate system with four numbers:
makeGPanel(xmin, xmax, ymin, ymax)
You can also specify a window title as the first parameter: 
DRAWING LINES 
from gpanel import * makeGPanel("My window", 0, 6, 2, 4) 
MEMO 
You can specify the width of the line in pixels using the function lineWidth(). 
CIRCLES AND RECTANGLES 
from gpanel import * makeGPanel(0, 20, 0, 20) setColor("red") x = 2 y = 2 while y < 20: move(x, y) fillCircle(1) move(x, 20  y) fillRectangle(2, 2) x = x + 2 y = y + 2 
MEMO 
You can draw many different figures with GPanel. Here are the most important commands:
For circles, arcs, ellipses, text, and rectangles that are simply defined by length and width, you must first determine their position by setting the graphics cursor using move(). GPanel knows the socalled X11 colors. There are a few dozen color names that you can find on the Internet here: http://cng.seas.rochester.edu/CNG/docs/x11color.html. You can choose all of these colors using setColor(color). 
EXERCISES 
