# Simple bouncing molecules in a 2-D system

graphics opengl
graphic_iter 10000000

quit_at_end yes

dim 2

boundaries x 0 100 r
boundaries y 0 100 r

species red
species green

difc red 3
difc green 1

color red red
color green green

time_start 0
time_stop 1000
time_step 0.01

mol 20 red u u
mol 8 green 80 40

cmd @ 200 updategraphics
cmd @ 200 echo stdout "update\n"


end_file



