Code error?

[parazitenew]

Hi,
I tried the script on debian 8. The terminal logs these errors:

fail2ban.sh: 25: fail2ban.sh: function: not found
fail2ban.sh: 26: fail2ban.sh: xrandr: not found
fail2ban.sh: 27: fail2ban.sh: xrandr: not found
: not foundban.sh: 32: fail2ban.sh: }
fail2ban.sh: 33: fail2ban.sh: function: not found
fail2ban.sh: 38: fail2ban.sh: Syntax error: "elif" unexpected (expecting "then")