ave these images to a directory.
To start, specify the MODEL_NAME environment variable (either a Hub model repository id or a path to the directory containing the model weights) and pass it to the ~diffusers.DiffusionPipeline.from_pretrained.pretrained_model_name_or_path argument. You’ll also need to set INSTANCE_DIR to the path of the directory containing the images. 
The OUTPUT_DIR variables is optional and specifies where to save the model t