code: def init_ui(self):
          
          self.id = 11
          self.setFixedSize(self.field_width, self.field_height)
          self.setPixmap(QtGui.QPixmap(EMPTY_PATH).scaled(
                  self.field_width*3, self.field_height*3))
          self.setStyleSheet("QLabel {background-color: blue;}")
docs: Init the ui.