The progress bar is like this image
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        Henson Fang
        
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                    2Possible duplicate of [How to add a progress bar to a shell script?](http://stackoverflow.com/questions/238073/how-to-add-a-progress-bar-to-a-shell-script) – Andrew May 04 '17 at 10:58
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                    @Andrew,the answer used "#",but i want to draw it like this image – Henson Fang May 05 '17 at 09:54
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                    look at https://en.wikipedia.org/wiki/Block_Elements – Andrew May 05 '17 at 12:31


