event triggering


	th = 1 / x	


	if rnd() < th then	' trigger approx once 

				' every 10 times



if x=10, trigger the code approximately 1 time out of every 10 times, randomly

	x=20, one time out of every 20 times, expressed in other ways,

	5% of the time.




[ rnd() function returns a number between 0 and 1]



e.g

re-sort memory storage after 'x' changes




