Context

There is a use case for creating a timer that has a variable duration. For example, if you wanted to randomly space events during a game.

Proposal

Add the ability to specify a range (min and max) of time and allow the timer to randomly choose a duration within that range.

HI, pitaya is very good, I use it in the project. Can you suport kcp or same other Efficient udp protocol？
thank you

Better detection and error messages for invalid values during Actor initialization would be useful to aid users in debugging.

Expected result:
Better and consistent error messages to aid in debugging and catch obvious invalid values.

Actual result:
The error messages are confusing (for beginner programmers) and inconsistent. And in one case the error is not detected at all.

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