w7shdev

#!/bin/bash
# You need to install pngquant 
# On mac os `brew install pngquant`
# copy all directories 15-20 
# rename the copied directories with suffix i 
# ex. i15 , i16 , i17 , i18 ,i19, i20
# This loop will do on only 1 level of nested directories 

PH_INPUT_DIRS=`ls i15`
PH_OUTPUT_DIR="15"