st: changing appearance of boxplots

[Jack Rabi <Jack.Rabi@CalgaryHealthRegion.ca>]

I have created a boxplot with two groups (boxes) for each category. 
I want to change the appearance of the median line for the white boxes
to black so that they are easier to see.  How do I change the color
of the median line for only one of the two groups.  I have
included the command I tried below.  This produces a faint greyish
white median line within the boxplot.  Couldn't find the answer in
the graphics manual.

graph box avgo2,  over(cs1) over(cage) asyvars medtype(cline) box(2, bcolor(black)) box(1, bfcolor(white) blcolor(black))boxgap(10) ytitle("SpO2") b2title("Minutes")legend(cols(1) position(5) ring(0) lab(1 "Vaginal delivery") lab(2 "Cesarean delivery"))

Regards,
Jack
--
Jack Rabi MD, FRCPC
Neonatologist
Assistant Professor (University of Calgary Dept. of Pediatrics)