R help - Feb 2004 - How to make a plot to represent 500 repeated 95%CI

I have a data with 500 repeated 95%CI and I want to make a plot as the
following to present them:

      |--------+--------|
        |-----+-----|
          |-----------+-----------|
                     |---------+--------|
....
.....

Would anyone mind naming the plot and some suggestion about R code?

Thanks ahead of time.
Heyen