Ferns' Graphics Library Functions :
 FGLChar()             Draws a character on the screen.
 FGLCircle()           Draws a circle on the screen.
 FGLEllipse()          Draws an ellipse on the screen.
 FGLFill()             Fills a part of the screen in a color.
 FGLFillCircle()       Draws a filled circle on the screen.
 FGLFillEllipse()      Draws a filled ellipse on the screen.
 FGLFillRectangle()    Draws a filled rectangle on the screen.
 FGLGetBackground()    Saves a part of the screen.
 FGLGetPixel()         Reads value of point on the screen.
 FGLInViewport()       Determines if point lies in viewport.
 FGLLine()             Draws a line on the screen.
 FGLLoadBMP()          Loads a BMP image into an array.
 FGLLoadFont()         Loads a font for graphical text-output.
 FGLMCursor()          Defines a mouse cursor.
 FGLMHide()            Hides the mouse cursor.
 FGLMSetClip()         Lets you confine mouse movement to a region.
 FGLMShow()            Shows the mouse cursor.
 FGLMState()           Gets the current state of the mouse.
 FGLPutBackground()    Restores background to the screen.
 FGLRGBColor()         Converts a RGB value to a color in the current mode.
 FGLRectangle()        Draws a rectangle on the screen.
 FGLSetBaseXY()        Lets you define the logical origin of the screen.
 FGLSetMode()          Sets a graphic or text mode.
 FGLSetPal()           Lets you set RGB values of a color.
 FGLSetPixel()         Puts a pixel on the screen.
 FGLSetViewport()      Sets the viewport.
 FGLShowBMP()          Shows a BMP image on the screen.
 FGLText()             Puts a text-string on the screen.