# Case 21: The Spider Walker ## Purpose --- Make a spider walker. ![](./images/Wonder-Building-Kit-case-21-01.png) ## Link: --- [micro:bit Wonder Building Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-32-in-1-wonder-building-kit-without-micro-bit-board?_pos=5&_sid=2094afd2f&_ss=r) ## Materials Required --- ![](./images/Wonder-Building-Kit-step-case-21-01.png) ## Bricks build-up --- ![](./images/Wonder-Building-Kit-step-case-21-02.png) ![](./images/Wonder-Building-Kit-step-case-21-03.png) ![](./images/Wonder-Building-Kit-step-case-21-04.png) ![](./images/Wonder-Building-Kit-step-case-21-05.png) ![](./images/Wonder-Building-Kit-step-case-21-06.png) ![](./images/Wonder-Building-Kit-step-case-21-07.png) ![](./images/Wonder-Building-Kit-step-case-21-08.png) ![](./images/Wonder-Building-Kit-step-case-21-09.png) ![](./images/Wonder-Building-Kit-step-case-21-10.png) ![](./images/Wonder-Building-Kit-step-case-21-11.png) ![](./images/Wonder-Building-Kit-step-case-21-12.png) ![](./images/Wonder-Building-Kit-step-case-21-13.png) ![](./images/Wonder-Building-Kit-step-case-21-14.png) ![](./images/Wonder-Building-Kit-step-case-21-15.png) ![](./images/Wonder-Building-Kit-step-case-21-16.png) ![](./images/Wonder-Building-Kit-step-case-21-17.png) ![](./images/Wonder-Building-Kit-step-case-21-18.png) ![](./images/Wonder-Building-Kit-step-case-21-19.png) ![](./images/Wonder-Building-Kit-step-case-21-20.png) ![](./images/Wonder-Building-Kit-step-case-21-21.png) ![](./images/Wonder-Building-Kit-step-case-21-22.png) ![](./images/Wonder-Building-Kit-step-case-21-23.png) ## Hardware Connection Connect a [motor](https://www.elecfreaks.com/geekservo-motor-2kg-compatible-with-lego.html) to M1 port on [Wukong breakout board](https://www.elecfreaks.com/wukong-board-with-lego-holder-for-micro-bit.html). ![](./images/Wonder-Building-Kit-case-21-06.png) ## Software Platform --- [MakeCode](https://makecode.microbit.org/) ## Coding --- ### Add extensions Click "Advanced" in the MakeCode to see more choices. ![](./images/Wonder-Building-Kit-case-21-02.png) Search with Wukong in the dialogue box to download it. ![](./images/Wonder-Building-Kit-case-21-03.png) ### Program ![](./images/Wonder-Building-Kit-case-21-04.png) Link:[https://makecode.microbit.org/_fyVf4ii4v0p8](https://makecode.microbit.org/_fyVf4ii4v0p8) ### Result The spider moves forward when button A is pressed, it moves backward when button B is pressed, and it stops moving when button A+B is pressed.