def tictactoe():
  p=makeEmptyPicture(350,350)
  addLine(p,125,25,125,325)
  addLine(p,225,25,225,325)
  addLine(p,25,125,325,125)
  addLine(p,25,225,325,225)
  addLine(p,130,30,220,120)
  addLine(p,220,30,130,120)
  addOval(p,130,130,90,90,red)
  return p