GraphicsWindow.Width=500
GraphicsWindow.Height=500
GraphicsWindow.BackgroundColor="gray"
GraphicsWindow.PenColor="cyan"

GraphicsWindow.DrawLine(250,0,250,500)
GraphicsWindow.DrawLine(0,250,500,250)

GraphicsWindow.DrawRectangle(50,50,150,150)
GraphicsWindow.BrushColor="Turquoise"
GraphicsWindow.FillRectangle(50,50,150,150)

GraphicsWindow.DrawRectangle(300,50,150,150)
GraphicsWindow.BrushColor="SteelBlue"
GraphicsWindow.FillRectangle(300,50,150,150)

GraphicsWindow.DrawEllipse(50,300,150,150)
GraphicsWindow.BrushColor="DodgerBlue"
GraphicsWindow.FillEllipse(50,300,150,150)

GraphicsWindow.DrawEllipse(300,300,150,150)
GraphicsWindow.BrushColor="MediumBlue"
GraphicsWindow.FillEllipse(300,300,150,150)