Copy using Scp in shell script using expect !!

Here is simple script to copy using scp and expect ,
We are creating a simple script on the fly and run that script

cat > /tmp/copy_from_remote.sh << EOF
#!/usr/bin/expect
set timeout 10
log_user 0
spawn scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $REMOTE_CREDENTIAL_USERNAME@$host_name :$

expect "*?assword"
send "$CREDENTIAL_PASSWORD\r"
expect "*100\%*\r"
EOF

chmod 777 /tmp/copy_from_remote.sh
sh /tmp/copy_from_remote.sh

Once script is ready need to run .
 For details we can add exp_internal 1 in the expect script
 Need to disable host key checking and known host file .