16×16 圆点代码高尔夫

Create a 16x16 grid of circles on a canvas. Compile the user's one-line expression with the Function constructor taking t, i, x, y and wrap the call in try/catch. Each frame, evaluate it per cell with elapsed seconds, clamp the result to [-1, 1], and draw a circle whose radius is the absolute value times half the cell size, colored by sign. Persist the expression in the URL query so every sketch is a shareable link.