To aid with visualisation of script runs, once a script execution is complete, a timer could be set to auto-trigger the next run.
Perhaps an autorun delay (default to 1000 msec?) under preferences?
Perhaps [en|dis]abled via Script -> Enable Autorun (similar to Enable indy compilation).
Perhaps even once enabled, it still requires the user to kick off the first run manually. Similarly, if the source buffer is modified, it would await a further explicit run action from the user.
In one sense, the same result could be achieved by the user having a loop with a delay but the idea here is to combine this feature with other visualisation features, e.g. "auto clear output on script run" and "visualisation of script results".