picking a new random seed

When doing Monte Carlo simulations, it may be uninteresting to redo
the same ones every time the workspace is loaded. As a crude method to
avoid reusing the same random number sequence, I wrote a loop to run
for one second generating a random number each time. To my surprise
the number of iterations in a second shows very little variation --
85% of 1-second trials ran the same number of iterations hence ended
with the same random seed. Also, that number was quite small. (APL
+DOS: It was 814 but I did also advance a counter in the loop.)

I guess it would be better just to read the system clock. At 100 tics
per second, there are as many tics in a year as the number of valid
values for []RL.

Charles