I made this method:

progress
	[[foo getPercentage < 1]
		whileTrue: [Delay forMilliseconds: 300.
			progress value
				contents: ((foo getPercentage min: 1.0)
						max: 0.0)]]
		forkAt: Processor userSchedulingPriority

Now I want to terminate it from another method before
whileTrue: becomes false.

How do I do that ?

Karl