Task Programing

Hello all,

I am trying to program a task in which the participant has to choose between two possible answers (which are two words written on the screen, each one mapped to a different keyboard input "w" or "o") that match or not a picture being displayed onscreen within a slide object. On one hand, when the participant chooses the correct answer there is no problem, the next picture is displayed and the task continues. On the other hand, if the participant chooses the wrong answer I needed the task to display for a short period of time a feedback that they got it wrong (such as an slide object with a big red "X" in the middle) and to loop the same image until the participant chooses the correct answer. I also need the program to continuously log the reaction time until the participant chooses the correct answer (it does not matter if the time the feedback is presented is added to the reaction time of the participant or not).
I have managed to make the task loop the same image when the participant chooses the wrong answer by using two input masks on the slide object in question and jumping to a label object positioned above this slide object when a wrong answer is given, but I have no idea on how to make the task show the feedback slide (with the red "X") only in this case (only when the participant chooses the wrong answer). I think I may need to use two combined table objects but I couldn't figure out how. Does anybody knows how to solve this?

Thank you very much!