When one of the images pops up, the others are invisible

Processing Coding Questions
1

Hello🤗 I want to make three images change one by one depending on the situation. How should I make them?
Can you help me?:joy:

2

You can have an int variable which indicates which image is shown

3

There are lots of resources to explore on the Processing website:

https://processing.org/

What is the situation?

:)