Hello, I'm an Italian student and I'm trying to code an IAT experiment for my final degree at university. I used as a guide the code already exisiting on psytoolkit site and I added the images I needed for the test of some people (light skin coloured and dark skin coloured). Everything seems going okay until I reach the mixed trial in which words and the images should be mixed as stimuli on the screen: in the separate trials everything goes good, but in the mixed ones the screen goes black and I can't see anything while the experiment keeps running. Still, when I compile it the program says that there are no errors. What I wanted to ask is, can I write a table with words and images or it's not possible and this is why it blocks? Is there anything I can do to fix this?