# Simple bouncing molecules in a 3-D system graphics opengl dim 3 species red green max_mol 200 difc red 3 difc green 1 color red 1 0 0 color green 0 1 0 time_start 0 time_stop 100 time_step 0.01 boundaries 0 0 100 r boundaries 1 0 100 r boundaries 2 0 100 r mol 100 red 20 30 20 mol 30 green u u u end_file