Is there a way to have 4 placeholders fixed on the screen while an asterisk appears in one of them every time the participant presses a key? I don’t mind if it is 4 dots or lines, as long as they are arranged horizontally. I would like the asterisk to appear slightly above one of those 4 locations every time a key is pressed. Is there a way to do it? I tried combining a picture and text stimuli but didn’t work out (the white part of the picture shadowed half of the asterisk).