Home/Breathing saddleOscillating xy saddleEquation: z = sin(t) * x * y / 5The factor sin(t) scales the whole surface. At zeros the graph flattens; when the sign flips, valleys and ridges swap.Use this preset to explain a time-dependent coefficient in a parametric equation.Related surfacesTwisted planez = x * ySaddle surfacez = x^2 - y^2Pulsing peakz = 10 * exp(-(x^2 + y^2)/10) * (1 + 0.4 * sin(t * 2))