You could take a look at the FrameRateMorph or
TheWorldMainDockingBar>>#startMessageTally.

Alternatively, run this in a workspace:

[Sensor peekMousePt y > 0] whileTrue: [World doOneCycle. Sensor peekMousePt
asString displayAt: 0 at 0].

Move your mouse to the top edge to end this. There is no need to create
custom Morphs to achieve your goal neither to run a separate process. Just
be sure that the main UI loop keeps running. :)

Best,
Marcel



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