Looks like there is typo in the example code in README.md

```
// Use log levels to set your log priority
log2.SetLogLevel(DebugLevel)
```
Since this code is not in the logger package, it doesn't have access to `DebugLevel`. Use this instead:
```
// Use log levels to set your log priority
log2.SetLogLevel(logger.DebugLevel)
```

Same for the WarningLevel 3 lines down.

Open README.md and inspect the example containing log2.SetLogLevel(DebugLevel), then check the matching WarningLevel example a few lines below. Update both references to use the logger-qualified constants, and confirm the README examples consistently refer to logger.DebugLevel and logger.WarningLevel.

Written by the indexing model from the issue text.