	0	0	1	null
integer: 	10	1	0	z := zscan_prompt("integer: ")
You entered: 123
	20	2	0	print("You entered: ",z)
integer: 	30	1	0	z := zscan_prompt("integer: ")
You entered: 456
	40	2	0	print("You entered: ",z)
event queue:
check queue:
	time	eid	pid	event
	50	1	0	z := zscan_prompt("integer: ")
