Beginner shell language, move half of the files

(Function: Move the general files in the directory to The./save directory, without moving the directory itself and the file fun. Sh)

Fun. Sh

#! /Bin/bash # When no. /create the directory if [-D. /save] Then ECHO "<save> has existed" else mkdir. /savefi # When counter is a multiple of 2, the counter = 0 is moved. # The remainder of counter/2 is SD = 0b = ". /"for files in * dolet counter =" $ counter + 1 "SD = $ ($ counter % 2 )) if [$ SD-EQ 0] & ["$ Files "! = "Fun. Sh"] & ["$ Files "! = "Save"] # counter % 2 = 0 and not the directory./save file and fun. Sh file then Echo "moving" $ filesmv "$ B $ Files"./savefidone