units real
atom_style bond
boundary f p p
region box block -5.000000000000001 5.000000000000001 -5 5 -5 5
create_box 1 box bond/types 1 extra/bond/per/atom 1 extra/special/per/atom 1

pair_style zero 5.0
pair_coeff * *
mass * 1.0
bond_style zero
bond_coeff * 1.0

create_atoms 1 single -4.0 0.0 0.0
create_atoms 1 single  4.0 0.0 0.0
create_atoms 1 single -5.0 0.0 0.0
create_atoms 1 single  5.0 0.0 0.0
create_bonds single/bond 1 3 1
create_bonds single/bond 1 4 2

group move id 1:2
write_restart walltest.restart

variable name string wall-harmonic
include wall.inc

fix 1 move wall/harmonic xlo -5.0 100 0.0 4.0 xhi 5.0 100 1.0 4.0
fix_modify 1 energy yes
run 5 post no

variable name string lepton-harmonic
include wall.inc

fix 1 move wall/lepton xlo -5.0 "k*(r-rc)^2;k=100.0" 4.0 xhi 5.0 "k*(r-rc)^2;k=100.0" 4.0
fix_modify 1 energy yes
run 5 post no

variable name string bond-harmonic
include wall.inc

bond_style harmonic
bond_coeff 1 100 4.0
run 5 post no

variable name string pair-harmonic
include wall.inc

pair_style harmonic/cut
pair_coeff 1 1 100 4.0
run 5 post no

variable eps index 0.02
variable sig index 2.0
variable name string wall-lj126
include wall.inc

fix 1 move wall/lj126 xlo -5.0 ${eps} ${sig} 4.0 xhi 5.0 ${eps} ${sig} 4.0
fix_modify 1 energy yes
run 5 post no

variable name string lepton-lj126
include wall.inc

fix 1 move wall/lepton xlo -5.0 "4.0*epsilon*((sigma/r)^12 - (sigma/r)^6);epsilon=v_eps;sigma=v_sig" 4.0 &
                       xhi  5.0 "4.0*epsilon*((sigma/r)^12 - (sigma/r)^6);epsilon=v_eps;sigma=v_sig" 4.0
fix_modify 1 energy yes
run 5 post no

variable name string pair-lj126
include wall.inc

pair_style lj/cut 4.0
pair_coeff 1 1 ${eps} ${sig}
pair_modify shift yes
run 5 post no

variable d0 index 20.0
variable al index 2.0
variable r0 index 1.2

variable name string wall-morse
include wall.inc

fix 1 move wall/morse xlo -5.0 ${d0} ${al} ${r0} 4.0 xhi 5.0 ${d0} ${al} ${r0} 4.0
fix_modify 1 energy yes
run 5 post no

variable name string lepton-morse
include wall.inc

fix 1 move wall/lepton xlo -5.0 "d0*(-1.0 + (1.0 - ralpha) * (1.0 - ralpha));ralpha=exp(-alpha*(r-r0));d0=v_d0;alpha=v_al;r0=v_r0" 4.0 &
                       xhi  5.0 "d0*(-1.0 + (1.0 - ralpha) * (1.0 - ralpha));ralpha=exp(-alpha*(r-r0));d0=v_d0;alpha=v_al;r0=v_r0" 4.0 
fix_modify 1 energy yes
run 5 post no

variable name string bond-morse
include wall.inc

bond_style morse
bond_coeff 1 ${d0} ${al} ${r0}
run 5 post no

variable name string pair-morse
include wall.inc

pair_style morse 4.0
pair_coeff 1 1 ${d0} ${al} ${r0}
pair_modify shift yes
run 5 post no

shell rm -f walltest.restart