> For the complete documentation index, see [llms.txt](https://longer-vision-robot.gitbook.io/arduino-full-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://longer-vision-robot.gitbook.io/arduino-full-stack/03_led_sensors/030_led_7colors.md).

# 3.8 LED 7 Colors

## Hardware Wiring

![LED 7 Colors](/files/-LCFEBybz6jAhHV5_hPD)

## Sketch

The code can be found at [Examples\_Arduino - sensor-kit-for-arduino - \_030\_LED\_7Colors - \_030\_LED\_7Colors.ino](https://github.com/LongerVisionRobot/Examples_Arduino/blob/master/sensor-kit-for-arduino/_030_LED_7Colors/_030_LED_7Colors.ino).

```
/*
  Blink
  Turns on an LED on for two second, then off for two second, repeatedly.

  This example code is in the public domain.
 */

void setup() {                
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  pinMode(13, OUTPUT);     
}

void loop() {
  digitalWrite(13, HIGH);   // set the LED on
  delay(2000);              // wait for a second
  digitalWrite(13, LOW);    // set the LED off
  delay(2000);              // wait for a second
}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://longer-vision-robot.gitbook.io/arduino-full-stack/03_led_sensors/030_led_7colors.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.