Hey im having a small problem with this again in a seperate experiment

Im trying to display a series of images at 40ms intervals in the same trial(same line in the excel document)
i want to be able to cancel out of the sequence if a button is pressed otherwise display all the images

im using rt:57,-1 as the time field
the minmax settings is 0-40!

at the moment the images all display as they should but i cant cancel out of the sequence early

is there a way to make the images display for 40ms each but cancel out of the trial when a button is pressed please?