bash conditions3

#!/usr/bin/env bash

WAITF=${1:-50};
LINE="";

# Populate line by '#' symbol
for i in $(seq 1 1 $WAITF);
do
    LINE="$LINE#";
done

# Show progressbar
for i in $(seq 1 1 $WAITF);
do
    echo -en "${LINE}${SPACES}\r";
    LINE="${LINE%?}";
    SPACES="$SPACES ";
    sleep 0.1s;
done

echo -e "\rBang!!!";

exit 0;