<script>
    const canvas = document.querySelector('#canvas');
    canvas.shapes = [
      { type: 'circle', x: 0, y: 0, radius: 0.25, color: 'red' },
      { type: 'rect', x: -20, y: 20, height: 10, width: 15, color: 'green' },
      {
        type: 'connector',
        start: { x: -10, y: -10 },
        showArrow: true,
        path: [
          { direction: 'down', length: 3 },
          { direction: 'right', length: 3 },
          { direction: 'up', length: 10 },
          { direction: 'right', length: 10 },
          { direction: 'down', length: 21 },
        ],
        clickable: true,
      },
    ];
  </script>