This visualization displays eye-tracking scan paths from multiple users over a stimulus image, showing fixation sequences as connected lines and circles sized by fixation duration. A dropdown menu lets viewers switch between different stimulus images. The code uses d3’s `nest()` to group fixation data by user, `scaleLinear` for axis mapping, `line()` for path generation, and `scaleOrdinal` with `schemeCategory10` for color encoding, with interactive tooltips on hover.