# case 24 The Climbing LEDs ## Introduction To make a climbing LEDs effect with the built-in sound sensor on the micro:bit. ## Quick Start ### Materials Required Nezha expansion board × 1 micro:bit V2 × 1 ***Tips: You may need to purchase [Nezha Inventor's Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-nezha-48-in-1-inventors-kit-without-micro-bit-board?_pos=2&_sid=ed1b6fbd2&_ss=r) if you want all the above compoents.*** ## MakeCode Programming ### Step 1 Click "Advanced" in the MakeCode to see more choices. ![](./images/case_24_10.png) ### Reference Link: [https://makecode.microbit.org/_edDbuTF37eix](https://makecode.microbit.org/_edDbuTF37eix) You may also download it directly below:
### Result The numbers of the light-up LEDs change with the sound level surrounding the micro:bit.