Simple pseudorandomisation of text stimuli

I have a simple experiemnt which displays text stimuli. The stimuli consist of 60 words, but each is presented 3 times (at different latencies), so with a random order, sometimes the same word comes up twice in a row.

Does anyone know of an easy way to pseudorandomise the order (e.g. prohibiting the current trial from having an identical stimuli to the last)? Thanks for any tips!



Have a look at my randomisation without repetition online demo