# Basic block in Follow Line

1. Line Detector

![](https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MClo3nC-1US0rbK8Qau%2F-MFyKc_BEz0dhKnvfOcE%2F-MFyQk9TfUINC-K9-NP0%2Fimage.png?alt=media\&token=d6d23fc1-240b-44ba-8270-2b715ca9d649)

Threshold : The level of color in grayscale (0-255) to start detection

Search start : Starting line of line detector on camera

Search height : 

![](https://1856353139-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MClo3nC-1US0rbK8Qau%2F-MFyKc_BEz0dhKnvfOcE%2F-MFySI2i2LHyLZyHQKni%2Fimage.png?alt=media\&token=f1fb6575-9760-42a1-a456-7f34f126fbef)

  2\.