atom_style molecular
boundary m m m
units real

pair_style lj/cut 14.0
bond_style harmonic
angle_style charmm
dihedral_style charmm

read_data sheet.data.txt

pair_coeff      1 1    0.070000    3.550053
bond_coeff      1    305.000000    1.375000
angle_coeff     1    40.000000  120.000000   35.000000    2.416200
dihedral_coeff  1     3.100000   2 180 0.0

write_dump  all image one-sheet.jpg type type size 960 960

replicate 1 1 2

write_dump  all image two-sheets.jpg type type size 960 960
write_data two-sheets.data.txt

minimize 0.0 0.0 1000 100000
write_dump  all image after-min.jpg type type size 960 960
write_data after-min.data.txt