This example displays a series of horizontal rectangular bars stacked vertically across the full screen, each referencing the same circular SVG mask. The bars are rendered as SVG `<rect>` elements created with D3's `selectAll` and `join` pattern, using a data array of 100 objects generated in a loop. The visualization relies on D3's `select` and `attr` methods to bind data and set position and dimensions, while the mask filters each bar to reveal a circular cutout effect.