01
Your team needs help. Let’s go to the Invention Lab!
02
What things have we designed before?
03
Let’s use this one!
04
05
Here’s your challenge: create the program that turns the alarm on when a blue creature walks by the Color Sensor.
06
Create the program. It makes the alarm turn on when a blue creature walks by the Color Sensor.
![U1L4_img_step_7.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt699173903ca64d97/5fbcb69a97f9f35d942ee031/U1L4_img_step_7.png?locale=en-us&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
07
Test your program.
![U1L4_img_step_8.gif](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt157a830b16e1ef33/5f0575eb5dfaac76f7e5179a/U1L4_img_step_8.gif?locale=en-us&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
08
Look at the Task in the Engineering Notebook.
How can you redesign the model or change the program?
![U1L4_img_step_7.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt699173903ca64d97/5fbcb69a97f9f35d942ee031/U1L4_img_step_7.png?locale=en-us&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
09
Let’s get these designs back to your team!
Draw your ideas in your Engineering Notebook, share them, and let’s see what’s next.
![Explore_L1_img_treehouse_step4.jpg](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blta908f41973594c79/60a429aedcc9b9546bfe4663/Explore_L1_img_treehouse_step4.jpg?locale=en-us&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)