#/bin/bash FIRST=00 LAST=15 IMAGE=plymouth/charge/throbber- FORMAT=png cd `dirname $0` convert $IMAGE$FIRST.$FORMAT $IMAGE$LAST.$FORMAT -morph $(( 10#$LAST - 1 )) __throbber.png COUNT=0 for i in `seq -w $FIRST $LAST`; do mv __throbber-$((COUNT++)).$FORMAT $IMAGE$i.$FORMAT done