help: limiting state changes with conditions

Arrgh, I'm kind of at a loss with this and I'm hoping someone's got an idea to help me out!

 Here's a summary of what I'm trying to get:

1. There is a list of 10 potential answers (e.g.: Apple, Banana, Cherry..)
2. There are 5 blank rectangles. Each rectangle has a state corresponding to each of the 10 answers (Apple state, Banana state, etc). 
3. When the learner types in one of the potential answers (say 'Cherry') and hits enter, the state of Rectangle 1 changes to 'Cherry'. 
4. The learner keeps guessing. This time they type in 'Banana', and the state of Rectangle 2 changes to 'Banana'. 
5. This goes on until all 5 of the rectangles have switched to one of the answer states.

What I'm stuck on is how to get only ONE rectangle to change states each time (first rectangle 1, then 2, then 3, etc). Right now when you type in 'Apple', ALL the rectangles switch to Apple state. 

I had tried to set this up by setting conditons and a 'disabled' state for each rectangle (so that the rectangles stay in 'disabled' state until the previous rectangle has switched, and the correct answer state changes will not happen to disabled rectangles). But it's not working, I assume because the switches are happening right away (learner hits enter, Rectangle 1 switches, Rectangle 2 switches 'on' because of the change, and then also changes its state to match the text entry). Or maybe it's not working because I messed something up.

Does anyone have another idea for how to build this out? Thanks!