VirtualKeyCode::P => timer.pause ^= true,
VirtualKeyCode::PageUp => timer.t += 0.1,
VirtualKeyCode::PageDown => timer.t -= 0.2,
VirtualKeyCode::P => timer.pause ^= true,
VirtualKeyCode::PageUp => timer.t += 0.1,
VirtualKeyCode::PageDown => timer.t -= 0.2,