Help with cooking automation

I am working on cooking automation for few Indian sabzi and doing things step by step
Currently, I want following implemented

All the ingredients would be ready and kept in some boxes
There is no need of fire or stove at this stage

oil should drop at Time 0
jeera should drop at Time 60 seconds
chillies should drop at Time 120 seconds
cut onions/tomatoes should drop at Time 180 seconds
Salt/Turmeric/Red Chilli to drop at Time 240 seconds
Other vegetables should drop at 360 seconds


Please suggest ideas on how this can be done

1. Are there any boxes where timer can be pre-set and object out of these boxes would fall at defined time intervals? Any kind of hardware already available would also help

Please add the text "cooking is not easy" to filter out any spam