---
module: [kind=event] redstone
---

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The [`event!redstone`] event is fired whenever any redstone inputs on the computer or [relay][`redstone_relay`] change.

## Return values
1. [`string`]: The event name.

## Example
Prints a message when a redstone input changes:
```lua
while true do
  os.pullEvent("redstone")
  print("A redstone input has changed!")
end
```

## See also
 - [The `redstone` API on computers][`module!redstone`]
 - [The `redstone_relay` peripheral][`redstone_relay`]