Assigning Intensities to Images

Hello! I want to run multiple staircases using images. Each image would have a designated intensity and I need to find a way to tell PsychoPy the intensity of each image. The layout in excel to run a staircase seems limited and doesn’t seem possible for this experiment.
The idea is that each time a participant gets an image wrong, they would move back 2 ‘level’s’ and if they got the answer correct they would advance 1 ‘level’. I’ve attached a spreadsheet trying to explain what I mean by this, but if anyone can tell me even how to assign intensities to images I would appreciate it!
Thanks in advance.
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