text: import { MultiLayer, MassMarks } from 'canvous-map/core';
  import generateMarkData from './generateMassMarks';
  
  const { Layer } = MultiLayer;
  const app = document.getElementById('app');
  
  const layer = new Layer({
    fitSize: true,
  });
  const multiLayer = new MultiLayer(app, {
    height: 700,
    width: 700,
  });
  multiLayer.addLayer(layer);
  
  const massMark = new MassMarks(layer.ctx, {
    data: generateMarkData({
      ...layer.getSize(),
      colCount: 120,
      rowCount: 120,
    }),
    radius: 2,
  });
  
  massMark.start();
  