Ubuntu :: Super Basic Shell Script - Cannot Get Return Line

I'm trying to create a super simple shell script, but I cant get a return line. The shell script looks like this (only the part that matters)
Code:
yes '' | ssh-keygen
The idea being it will put in a blank char. Then enter until the program finishes. The problem is, it only does the first time, the next 2 times I have to hit enter, it requires me to input it manually (which is exactly what I'm trying to avoid).

The full script (if you care):
Code:
#!/bin/sh
# Created by Omega
# First, program creates RSA key, named id_rsa and id_rsa.pub
# Second, program send the public code to requsted server.
echo 'Removing old id_rsa key (if applicable)'
rm -rf ~/.ssh/id_rsa.pub
rm -rf ~/.ssh/id_rsa
echo "Creating RSA key"
yes '' | ssh-keygen

# Checking if ssh-kkeygen created requested file
if [ -e ~/.ssh/id_rsa.pub ]
then
echo 'Done'
echo 'Username and Server in: me@server format'
read var1
echo 'Port Number? If standard put 22'
read var2
ssh-copy-id -i ~/.ssh/id_rsa.pub "-p $var2 $var"
else
echo ''
echo 'ERROR, ssh-keygen did not execute correctly'
echo 'Retrying...'
echo ''
echo 'Please leave all options default (just press enter)'
ssh-keygen
if [ -e ~/.ssh/id_rsa.pub ]
then
echo 'Done'
echo 'Username and Server in: me@server format'
read var1
echo 'Port Number? If standard put 22'
read var2
ssh-copy-id -i ~/.ssh/id_rsa.pub "-p $var2 $var1"
else
echo 'ERROR, ssh-keygen did not execute correctly'
echo 'Quitting'
exit
fi
fi
# End