sequential and random variables in loop
hi all, i am looking to create both random and sequential variables in a loop.
e.g. i will have 5 trials, each trial has a fixation cross followed by a random letter as a stimulus. however, i have a fixed sequence for how long the cross is presented for - i.e. first trial 30s, 2nd trial 5s, 3rd trial 25s, then 4th trial 10s and 5th trial 15s - in that exact order.
is it possible for me to set in the loop such that I can randomly present a stimulus, but at the same time, have a fixed sequence of timings of how long the cross is presented?