title: Kivy how to remove label and add
body: <p>I want to make a simple game where you tap and you earn money. I made some code which does that however I don't know how to remove the label. Right now all it does is add 1 to the money variable and make new label.</p>
  
  <p>.py</p>
  
  <pre><code>money = 0
  
      class GameScreen(Screen):
          def money(self):
              global money
              money += 1
              self.add_widget(Label(text=str(money), color=(1,0,0,1), font_size=(45),size_hint=(0.2,0.1), pos_hint={"center_x":0.5, "center_y":0.9}))
              print(money)
  </code></pre>
  
  <p>.kv</p>
  
  <pre><code>&lt;GameScreen&gt;:
      name: "GameScreen"
      canvas:
          Color:
              rgb: 1, 1, 1
          Rectangle:
              pos: self.pos
              size: self.size
  
      Button:
          size: self.texture_size
          on_release: root.money()
          text: "Press"
          font_size: 50
          color: 1,1,1,1
          background_color: (0,0,0,1)
          background_normal: ""
          background_down: ""
          size_hint: None, None
          pos_hint: {"center_x":0.5, "center_y":0.6}
          width: self.texture_size[0] + dp(10)
          height: self.texture_size[1] + dp(10)
  </code></pre>