def logo():
    import tkinter
    canvas=tkinter.Canvas()
    canvas.pack()


    canvas.create_rectangle(85,45,250,115, fill='Black')
    canvas.create_rectangle(90,50,245,110, fill='Navy')

    canvas.create_rectangle(140,115,195,140, fill='Black')
    canvas.create_oval(120,135,215,165, fill='Black')

    canvas.create_rectangle(25,180,175,230, fill='Black')
    canvas.create_rectangle(30,185,170,225, fill='Gray')

    canvas.create_rectangle(185,180,225,230, fill='OrangeRed')
    canvas.create_oval(195,190,215,220, fill='DarkMagenta')
    canvas.create_rectangle(205,190,205,200, fill='Black')
    canvas.create_rectangle(195,200,215,200, fill='Black')

    canvas.create_rectangle(35,190,135,195, fill='Gray')
    
    canvas.create_rectangle(45,190,45,195, fill='Black')
    canvas.create_rectangle(55,190,55,195, fill='Black')
    canvas.create_rectangle(65,190,65,195, fill='Black')
    canvas.create_rectangle(75,190,75,195, fill='Black')
    canvas.create_rectangle(85,190,85,195, fill='Black')
    canvas.create_rectangle(95,190,95,195, fill='Black')
    canvas.create_rectangle(105,190,105,195, fill='Black')
    canvas.create_rectangle(115,190,115,195, fill='Black')
    canvas.create_rectangle(125,190,125,195, fill='Black')
    canvas.create_rectangle(135,190,135,195, fill='Black')

    canvas.create_rectangle(35,200,110,220, fill='Gray')

    canvas.create_rectangle(35,205,110,205, fill='Black')
    canvas.create_rectangle(35,210,110,210, fill='Black')
    canvas.create_rectangle(35,215,110,215, fill='Black')
    canvas.create_rectangle(45,200,45,220, fill='Black')
    canvas.create_rectangle(50,200,50,220, fill='Black')
    canvas.create_rectangle(55,200,55,220, fill='Black')
    canvas.create_rectangle(60,200,60,220, fill='Black')
    canvas.create_rectangle(65,200,65,215, fill='Black')
    canvas.create_rectangle(70,200,70,215, fill='Black')
    canvas.create_rectangle(75,200,75,215, fill='Black')
    canvas.create_rectangle(80,200,80,215, fill='Black')
    canvas.create_rectangle(85,200,85,215, fill='Black')
    canvas.create_rectangle(90,200,90,220, fill='Black')
    canvas.create_rectangle(95,200,95,220, fill='Black')
    canvas.create_rectangle(100,200,100,220, fill='Black')

    canvas.create_rectangle(145,195,165,220, fill='Gray')

    canvas.create_rectangle(150,195,150,215, fill='Black')
    canvas.create_rectangle(155,195,155,220, fill='Black')
    canvas.create_rectangle(160,195,160,220, fill='Black')
    canvas.create_rectangle(145,200,165,200, fill='Black')
    canvas.create_rectangle(145,205,160,205, fill='Black')
    canvas.create_rectangle(145,210,165,210, fill='Black')
    canvas.create_rectangle(145,215,160,215, fill='Black')

    canvas.create_rectangle(120,215,125,220, fill='Gray')
    canvas.create_rectangle(125,210,130,215, fill='Gray')
    canvas.create_rectangle(125,215,130,220, fill='Gray')
    canvas.create_rectangle(130,215,135,220, fill='Gray')


    canvas.create_text(170,75,fill="White",font="Helvetica",text="Welcome in our lesson!")