Shell Programming and Scripting

cd path
worldsize1=[du -s world]
worldsize2=[du -s world]
while [[$worldsize1 -lt $worldsize2 || $worldsize1 -eq $worldsize2]];do
    worldsize1=[du -s world]
    while [[$SECONDS % 300 -ne 0]];do
    done
    mkdir tempworld
    cp world /tempworld/
    cd path/tempworld
    mv world copiedworld
    cd path
    mv tempworld/copiedworld copiedworld
    rmdir tempworld
    worldsize2=[du -s world]
done

path='/path/to/dir'
cd "$path"
worldsize1=$( du -s world )
worldsize2=$( du -s world )
while [ $worldsize1 -lt $worldsize2 ] || [ $worldsize1 -eq $worldsize2 ];do
    worldsize1=$( du -s world )
    # no need for a loop to wait 5 mins
    # you would be wasting CPU cycle in that way
    sleep 300
    mkdir tempworld
    cp world /tempworld/
    cd path/tempworld
    mv world copiedworld
    cd path
    mv tempworld/copiedworld copiedworld
    rmdir tempworld
    worldsize2=$( du -s world )
done