How do I move circles in Python using pyqt5

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Python

PyQt

i work on this project and i did moving random circles. after a while some of them will change the color and keep moving. I tried to do it in the method update_scene using add_Ellipse but they are not moving and i didn't understand why. I am new in Python so please be kind. thank you

What I have tried:

class Circle(QGraphicsEllipseItem):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.anim = QVariantAnimation()
        self.setRect(QRectF(-10, -10, 20, 20))
        self.setPen(QPen())


    def move_to(self, pos, duration=1000):
        if self.anim.state() == QAbstractAnimation.Running:
            self.anim.stop()
        self.anim.setStartValue(self.pos())
        self.anim.setEndValue(pos)
        self.anim.valueChanged.connect(self.setPos)
        self.anim.setDuration(duration)
        self.anim.start()

class View(QtWidgets.QMainWindow, Ui_MainWindow):

   def movee(self):
        for i in range(self.num_circles):
            self.circl_liste = Circle()
            for pa in dir(self.circl_liste):
                self.circl_liste.setBrush(self.blue_brush)
                self.circl_liste.Status = 'Not Sick'
                self.circl_liste.anim.finished.connect(lambda item=self.circl_liste: 
              self.move_circles(item))
                self.scene.addItem(self.circl_liste)
                self.move_circles(self.circl_liste)
      def move_circles(self, item):
        self.pos = QPointF(*random.sample(range(-150, 250), 2))
        item.move_to(self.pos)

      def update_scene(self, circl_liste):
          for i in circl_liste:
              for k in circl_liste:
                  if i.Status == 'Sick':
                    self.scene.addEllipse(QRectF(self.circl_liste.x(), 
             self.circl_liste.y(), 20, 20), self.pen,
                                          self.red_brush)