# Simple bouncing molecules in a 2-D system

graphics opengl

dim 2
species red green
max_mol 100

difc red 3
difc green 1

color red 1 0 0
color green 0 1 0

time_start 0
time_stop 1000
time_step 0.01

boundaries 0 0 100 r
boundaries 1 0 100 r

mol 20 red u u
mol 8 green 80 40

end_file