This heatmap visualizes the distribution of various mushroom species across eight habitat types—grasses, leaves, meadows, paths, heaths, urban, waste, and woods—and four seasons (spring, summer, autumn, winter). Each cell’s color intensity reflects the number of species recorded in that habitat-season combination, with data loaded from a CSV file. The visualization uses the p5.js library to create a canvas, process the tabular data with a `TypedDict`, and render colored rectangles via `lerpColor` to map species counts to a purple gradient.