.\" diag1.pic -- a diagram example
.\" $Id$
.\" Carlos Duarte, 971201/981017
.\"
.PS
scale = 2.54
a = 0.6
box wid 4*a ht a invis 
box wid a ht a; box same; box same;  box same; 
box wid a ht a with .nw at 1st box .sw - (0,.8)
box wid a ht a with .nw at last box .sw 
box wid a ht a with .nw at last box .sw 
box wid a ht a with .nw at last box .sw 
for f = 6 to 9 by 1 do {
	spline from `f'th box .e right (f-3)/5 then -> to `f-4'th box .s
}
.PE