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import tkinter as tk

APP_TITLE = "Canvas Objekt bewegen"
APP_XPOS = 100
APP_YPOS = 100
APP_WIDTH = 350
APP_HEIGHT = 200


class Application(tk.Frame):

    def __init__(self, app_win):
        self.app_win = app_win
        tk.Frame.__init__(self, app_win)
        
        self.canvas = tk.Canvas(self, bg='steelblue')
        self.canvas.pack()
        
        xpos = 20
        ypos = 20
        xoffset = 50
        yoffset = 50
        for shape_nr, shape_color in enumerate(('yellow', 'red', 'green')):
            self.canvas.create_oval(xpos, ypos, xpos+100, ypos+100, width=1,
                fill=shape_color, tags='shapes')
            xpos += xoffset
            ypos += yoffset
        
        self.move_shapes()
            
    def move_shapes(self):
        self.canvas.move('shapes', 2, 1)
        self.app_win.after(100, self.move_shapes)
        
def main():
    app_win = tk.Tk()
    app_win.title(APP_TITLE)
    app_win.geometry("+{}+{}".format(APP_XPOS, APP_YPOS))
    #app_win.geometry("{}x{}".format(APP_WIDTH, APP_HEIGHT))
    app_win.option_add("*highlightThickness", 0)
    
    app = Application(app_win)
    app.pack(fill='both', expand=True)
    
    app_win.mainloop()
 
 
if __name__ == '__main__':
    main()