Diagram(name = 'BouncingBalls',
		author = 'Simon Van Mierlo',
		description = 'Tkinter frame with bouncing balls in it.'):
	Top {
		self.canvas = ui->append_canvas(ui.window,100,310,['background':'#eee'])
		self.colors = ['#f00','#ff0','#0f0']
		self.lights = [canvas->add_rectangle(size/2, size / 2, size, size, ['fill':'#000']),
						canvas->add_rectangle(size / 2, size / 2 + offset, size, size, ['fill':'#000']),
						canvas->add_rectangle(size / 2, size / 2 + 2 * offset, size, size, ['fill':'#000'])]

	}

	Inport(name = 'input')

	Class(name = 'MainApp', default = True):
		Association(name = 'fields', class = 'Field')
		Inheritance(class = 'RuntimeClassBase', priority = 1)
		Inheritance(class = 'tk.Tk', priority = 0)