01
Leo is frustrated that he cannot say ‘good morning’ to his friends. He is too short and gets lost in the crowd.
02
Leo thinks there must be a solution. He would like to greet his friends before they go into their classrooms.
03
Build a waving machine that Leo can use to say ‘good morning’ to his friends.
04 -BI
05
Here is your challenge: create the program that starts the waving machine.
06
![U5L1_img_step_7.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blte3b308e897330735/5eeb97e85f3aa42c4669e4d5/U5L1_img_step_7.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Create the program. It starts the waving machine.
07
![U5L1_img_step_8.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/bltf16dc8c75f013bec/5eeb97d343f6b42a02432736/U5L1_img_step_8.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Test your program.
08
Upgrade the program for the waving machine.
09
![U5L1_inspiration_img_1.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt357ed5da57bc236b/5eeb97fc688c1c62a49ae7ce/U5L1_inspiration_img_1.png?locale=en-au&auto=webp&format=jpeg&width=216&height=124&quality=90&fit=bounds)
![U5L1_inspiration_img_1.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt357ed5da57bc236b/5eeb97fc688c1c62a49ae7ce/U5L1_inspiration_img_1.png?locale=en-au&auto=webp&format=jpeg&width=216&height=124&quality=90&fit=bounds)
![U5L1_inspiration_img_2.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt433dea3d554a304d/5eeb97fd43f6b42a02432740/U5L1_inspiration_img_2.png?locale=en-au&auto=webp&format=jpeg&width=216&height=124&quality=90&fit=bounds)
![U5L1_inspiration_img_3.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt7d83e947c3c24188/5eeb97fd6aaf2924fd2312fe/U5L1_inspiration_img_3.png?locale=en-au&auto=webp&format=jpeg&width=216&height=124&quality=90&fit=bounds)
Design your own waving machine.