> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gelato.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Trigger Types

## 1. Time Interval

Use this trigger to execute tasks at regular intervals, e.g., every 10 minutes or once every 24 hours. It's like setting a straightforward, recurring alarm.

## 2. Cron Expressions

This offers a more refined control compared to the Time Interval. With [cron expressions](https://en.wikipedia.org/wiki/Cron), you can set tasks to run at specific moments, such as "every Tuesday at 3 PM" or "on the 1st of every month". It gives you precision in task scheduling.

## 3. On-Chain Event

Ideal for those wanting their tasks to respond dynamically to blockchain activities. Whenever a specified event occurs on the blockchain, e.g.

```solidity, sol theme={null}
//event creation with argument types and names
event ownerChanged(address indexed _from, address indexed _to);
```

This trigger springs your task into action.

## 4. Every Block

This function operates with the rhythm of the blockchain itself, executing your chosen function each time a new block is created.

## Note

Irrespective of the trigger type you opt for, you can tie it to running any of the following:

* [Typescript Function](/web3-functions/introduction/typescript-functions)
* [Solidity Function](/web3-functions/introduction/solidity-functions)
* [Transaction](/web3-functions/introduction/automated-transactions)