Ask a backupscript question

Ask a question about backupscript-Linux general technology-Linux technology and application information. The following is a detailed description. The company's fedora core needs a backup script. I tried to write one, but it prompts an error. I am a newbie. I also hope that the linux experts can give me some advice.

#! /Bin/bash
WEEK = $ ('date + % V ')
DAYS = $ ('date + % U ')
If ['expr $ WEEK % 2'-eq 0]
Then
If [$ DAYS-eq 3]
Then
Rm-rf/x2/1
Cp-Rf/x1/x2/1
Else
Rm-rf/x2/2
Cp-Rf/x1/x2/2
Fi
Else
If [$ DAYS-eq 4]
Then
Rm-rf/x3/1
Cp-Rf/x1/x3/1
Else
Rm-rf/x3/2
Cp-Rf/x1/x3/2
Fi
Fi

The system prompts line 4 unexpected EOF while looking for matching.
Line 24 syntax error: unexpected end of file