# LED Switching

## What will we do

In this lesson we will learn how to switch two LED’s on and off one at a time. It will work in the following sequence

* Turn Red LED ON
* Wait for 1 second
* Turn Red LED OFF and Yellow LED ON
* Wait for 1 second

Run the above code for 8 times.

## Parts List

You will need the following parts:

* **1x** arduino uno
* **1x** arduino USB Cable
* **1x** Breadboard
* **3x** Jumper Wire
* **2x** LED (RED and Yellow)
* **2x** Resistor

## **Wiring it up**

![](https://451694785-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MPda5vaSVRKTQ6AoAmb%2Fuploads%2Fgit-blob-4c09458d4aff6095615d0d650232d0a34f650328%2Fimage.png?alt=media)

Ensure that the LED are the right way around, with the longer positive leads (anodes) to the left.

## mBlock IDE

Launch the mBlock IDE (<https://ide.mblock.cc/#/>) and select the Arduino Uno Device and install the [Kids Code Extension](https://learn.arduinosa.co.za/blocking-coding-lessons/blinking-an-led#install-the-kidscode-extension) \*\*\*\*

## Block Coding <a href="#block-coding" id="block-coding"></a>

![](https://451694785-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MPda5vaSVRKTQ6AoAmb%2Fuploads%2Fgit-blob-e6b201398bcf0c6023037547abaa1b89d4685025%2Fimage.png?alt=media)

{% embed url="<https://ide.mblock.cc/#/?cloudProjectId=262531>" %}