wind
Returns a pixmap with a wind effect.
Syntax

wind(pm, p, d, f)

pm
is a pixmap 
p
is a real number 
d
is an integer 
f
is a real number

Description
wind(pm, p, d, f)
returns pm
with a wind effect. p
is the probability that a pixel is “blown away”, d
the average distance a pixel moves (if at all), and f
the fadeout factor (between 0 and 1).
Examples
wind(ExampleData("Sally"), 1, 20, 1)