I am trying to send the people who get it wrong in the attention check to the previous question (where the prompt is), and let them read the prompt and try out the attention check again. However, I cannot create a loop such that you will always be sent back if you get the attention wrong. Right now, the best I can think of is to manually add branch, but I cannot do it infinitely. The attached photo is my current solution, but the participants can proceed after failing the attention check the second time. 

Just to add that we don’t want to include a back button and the initial plan is to separate thew prompt and the questions, so I cannot just do cross validation to stop participants to move forward.

What should I do? Thank you!