// Instead of changing the speed instantly, change it over the course of
// about 200 ms. This is a simple linear ramp; I tried various forms of
// Bézier curves for more elegant/dramatic changing, but it seemed linear
// Instead of changing the speed instantly, change it over the course of
// about 200 ms. This is a simple linear ramp; I tried various forms of
// Bézier curves for more elegant/dramatic changing, but it seemed linear