Hi,
You are waiting for a click on the “come back” button, so whatever comes after that wait command won’t be executed until you click the “come back” button, but because the callback commands executed upon click on that button ends the trial immediately, the commands below wait never get to be executed at all. Just remove .wait() and things will work
You might want to replace jump("instructions_D") with jump(startsWith("p_trial_")) if you don’t want to show the practice instructions again. .callback("intructions_D") won’t work because "instructions_D" is not a command, it’s a plain string
Jeremy