# This file of Smoldyn statements is designed to be read by config.txt.
# It will not run on its own.

define 20+10 30
define TWENTY 20

species red
species green

difc red 3
difc green 1

read_file ROOTcolors.txt

mol 100 red TWENTY TWENTY+10 TWENTY
mol 30 green u u u

end_file