Connect / charging double thump

import CoreHaptics

func playConnectThump(engine: CHHapticEngine) throws {
    func thump(at time: TimeInterval, intensity: Float) -> CHHapticEvent {
        CHHapticEvent(eventType: .hapticTransient, parameters: [
            CHHapticEventParameter(parameterID: .hapticIntensity, value: intensity),
            CHHapticEventParameter(parameterID: .hapticSharpness, value: 0.25), // round
        ], relativeTime: time)
    }

    let pattern = try CHHapticPattern(
        events: [thump(at: 0, intensity: 0.9),
                 thump(at: 0.16, intensity: 0.7)],
        parameters: [])
    let player = try engine.makePlayer(with: pattern)
    try engine.start()
    try player.start(atTime: CHHapticTimeImmediate)
}