use mkdir so users are made aware if the output directory already exists, ie, if the demo script has been run previously
use mkdir so users are made aware if the output directory already exists, ie, if the demo script has been run previously

asoplata/DynaSim,asoplata/DynaSim,kupiqu/DynaSim,DynaSim/DynaSim,DynaSim/DynaSim,kupiqu/DynaSim,asoplata/DynaSim,kupiqu/DynaSim,DynaSim/DynaSim,asoplata/DynaSim,DynaSim/DynaSim,DynaSim/DynaSim,kupiqu/DynaSim,asoplata/DynaSim