Bash Scripting- Repeat echo while answer is No

I am very new to Bash scripting, so please excuse me if the question is somewhat incoherent. I want my script to repeat a question 4 times if the user answers No, if the user answers Yes, then the script can exit, this is what I have so far

#!/bin/bash
echo "Would you like a cup of tea?"

read answer

while true;

do

        if [ $answer = Y ] then
        echo "Great, I'll make tea now"; then
                break
        if [ $answer = N ] then
        echo "Are you sure?"
        continue
        if [ $answer = N ] then
        echo "Are you sure?"
        continue
        if [ $answer = N ] then
        echo "Are you sure?"
        continue
        if [ $answer = N ] then
        echo "Ok, I give up!"
        exit
fi

Any help is much appreciated