val thirtyMinutes = 30.minutes
val twoMilliseconds = 2.milliseconds

val duration1 = 10.days + 1.hours + 5.minutes + 3.seconds
val duration2 = 10.days and 1.hours and 5.minutes and 3.seconds

val createdAt = 10.days and 1.hours and 5.minutes before ZonedDateTime.now()
val willDoSomethingAt = 30.minutes + 10.seconds + 3.hours after Instant.now()

if (createdAt.isBefore(30.minutes + 10.seconds + 3.hours after now)) {
    // do something
}
if (now.isAfter(12.hours after scheduledTime)) {
    // do something later
}