# Case 29: The Stone Thrower ## Purpose --- Make a stone thrower. ![](./images/Wonder-Building-Kit-case-29-01.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-29-01.png) ## Bricks build-up --- ![](./images/Wonder-Building-Kit-step-case-29-02.png) ![](./images/Wonder-Building-Kit-step-case-29-03.png) ![](./images/Wonder-Building-Kit-step-case-29-04.png) ![](./images/Wonder-Building-Kit-step-case-29-05.png) ![](./images/Wonder-Building-Kit-step-case-29-06.png) ![](./images/Wonder-Building-Kit-step-case-29-07.png) ![](./images/Wonder-Building-Kit-step-case-29-08.png) ![](./images/Wonder-Building-Kit-step-case-29-09.png) ![](./images/Wonder-Building-Kit-step-case-29-10.png) ![](./images/Wonder-Building-Kit-step-case-29-11.png) ![](./images/Wonder-Building-Kit-step-case-29-12.png) ![](./images/Wonder-Building-Kit-step-case-29-13.png) ![](./images/Wonder-Building-Kit-step-case-29-14.png) ![](./images/Wonder-Building-Kit-step-case-29-15.png) ![](./images/Wonder-Building-Kit-step-case-29-16.png) ![](./images/Wonder-Building-Kit-step-case-29-17.png) ![](./images/Wonder-Building-Kit-step-case-29-18.png) ![](./images/Wonder-Building-Kit-step-case-29-19.png) ![](./images/Wonder-Building-Kit-step-case-29-20.png) ![](./images/Wonder-Building-Kit-step-case-29-21.png) ![](./images/Wonder-Building-Kit-step-case-29-22.png) ![](./images/Wonder-Building-Kit-step-case-29-23.png) ![](./images/Wonder-Building-Kit-step-case-29-24.png) ![](./images/Wonder-Building-Kit-step-case-29-25.png) ![](./images/Wonder-Building-Kit-step-case-29-26.png) ![](./images/Wonder-Building-Kit-step-case-29-27.png) ![](./images/Wonder-Building-Kit-step-case-29-28.png) ![](./images/Wonder-Building-Kit-step-case-29-29.png) ![](./images/Wonder-Building-Kit-step-case-29-30.png) ![](./images/Wonder-Building-Kit-step-case-29-31.png) ![](./images/Wonder-Building-Kit-step-case-29-32.png) ![](./images/Wonder-Building-Kit-step-case-29-33.png) ![](./images/Wonder-Building-Kit-step-case-29-34.png) ![](./images/Wonder-Building-Kit-step-case-29-35.png) ![](./images/Wonder-Building-Kit-step-case-29-36.png) ![](./images/Wonder-Building-Kit-step-case-29-37.png) ![](./images/Wonder-Building-Kit-step-case-29-38.png) ![](./images/Wonder-Building-Kit-step-case-29-39.png) ![](./images/Wonder-Building-Kit-step-case-29-40.png) ![](./images/Wonder-Building-Kit-step-case-29-41.png) ## Hardware Connection Connect two [motors](https://www.elecfreaks.com/geekservo-motor-2kg-compatible-with-lego.html) to M1 and M2 ports on [Wukong breakout board](https://www.elecfreaks.com/wukong-board-with-lego-holder-for-micro-bit.html). ![](./images/Wonder-Building-Kit-case-29-06.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-29-04.png) Link:[https://makecode.microbit.org/_K6oek8JP8bgf](https://makecode.microbit.org/_K6oek8JP8bgf) ### Result When the micro:bit is powering on, it displays a heart icon. When button A is pressed, the stone thrower performs a stone throwing action; when button B is continuously pressed, the stone thrower moves forward; release button B and the stone thrower stops.