$md
   temp=600 # in K
   time= 100.0  # in ps
   dump= 100.0  # in fs
   step=  1.0  # in fs
   shake=0
   sccacc = 2.0
   hmass = 4
   nvt=true
$end

$wall
 potential=logfermi
 sphere: 48 ,all
$end

$cma