delay & map?

gistfile1.swift

        let errorOrCompletedColor = viewModel.triggerDiscount
            .executionObservables
            .flatMapLatest { $0 }
            .materialize()
            .map { event -> UIColor in
                switch event {
                case .error(_):
                    return TriggerDiscountView.errorColor
                case .next(_), .completed:
                    return TriggerDiscountView.successColor
                }
        }
        
        errorOrCompletedColor
            .bind(to: indicatorView.rx.backgroundColor)
            .disposed(by: bag)
        
        errorOrCompletedColor
            .delay(1.0, scheduler: MainScheduler.instance)
            .map { _ -> UIColor in .clear }
            .bind(to: indicatorView.rx.backgroundColor)
            .disposed(by: bag)