A question about changing predicting time interval

[U70-TK]

Hi Liya Guang! Thank you so much for your brilliant paper and great contribution to the field.
I'm trying to comprehend your code but right now Im stuck on how to change the prediction time interval to make it capable for predicting 15min, 30min and 60min respectively. Cuz right now from what I can understand, what it does is just to make a prediction on one fixed time interval. Could you please kindly advise where exactly in the code do I need to change in order to predict for other time intervals?
Thanks for reading and any help is highly appreciated!