This example demonstrates how to build an interactive SVG scene using the Document Object Model (DOM) and the SVG namespace. It creates a full-window SVG element populated with a mask and a vertical rectangle, using methods like `createElementNS` and `setAttribute`. The code prepares a loop for generating 100 elements but currently leaves it empty, showing foundational SVG construction in raw JavaScript without external libraries. The visualization illustrates basic SVG structure, viewport sizing, and programmatic element creation for future graphics.