text: from tkinter import *
  
  janela = Tk()
  canvas = Canvas(janela, height=500, width=500)
  #canvas.create_line(0, 0, 250, 450, fill="blue", width=5)
  #canvas.create_rectangle(0, 0, 450, 450, fill="green", width=5)
  #canvas.create_arc(0, 0, 450, 450)
  
  canvas.create_arc(0, 0, 500, 500, fill="red", extent=180, width=10)
  canvas.create_arc(0, 0, 500, 500, fill="white", extent=180, start=180, width=10)
  canvas.create_oval(190, 190, 310, 310, fill="white", width=10)
  canvas.pack()
  
  
  janela.mainloop()
  