Hi,
Delay shapes pause the execution of your orchestration. I would suggest setting each delay shape to a minute or two (not an hour) if your orchestration will be receiving all 4 msgs within a reasonable timeframe. When all 4 msgs are received, set a flag that will break out of your loop shape. You should also have a counter to track how much time has elapsed (when you are looping through to listen on all 4 msgs), when that counter goes over 1 hour, set a condition to send out an error message and break out of the loop.
Good luck!
Daniel.