I've tried searching for this question but can't seem to find an answer.
There are others asking to auto execute based on an hour interval or other real world check.
What I would like to do is have a contract sitting with an existing balance of ETH watching the balance of another contract. If that balance of contract2 drops below a certain threshold on the next block I'd like contract1 to auto execute a send to bring the balance of contract2 back up.
Basically what I'm asking is if the behaviour of a contract auto evaluates the state of other contracts that it's built to monitor and based on its own logic make a decision to execute a transaction given certain conditions of that contract's state? Does it do that evaluation every block or do I have to build a script to ping infura every few seconds even if there isn't a new block?