text: class FireBase extends GOWImage {
      // ctor
      constructor(name, scene, x, y) {
          try {
              super(name);
              this.printName();
  
              this.setImgInfo(x, y, "FireBase").loadByScene(scene);
          } catch(e) {
              logAlert(this._name + "ctor.catched: " + e);
          }
      }
  
      resetPosition() {
          this.setX(this._oriCoord.x).setY(this._oriCoord.y);
      }
  
  }
  