// Generate the points for the cycloid (X and Y coordinates)
    for (i = [0 : n_points-1]) {
        t = i * 2 * PI / (n_points-1);  // parameter (use PI instead of pi)
        x = r * (t - sin(t));  // Cycloid X equation
        y = r * (1 - cos(t));  // Cycloid Y equation