4. Communicating with Light

Open Ended

• 1. Open your ClassNotebook application. 

• 2. In the Content Library, navigate to the "Unit 1" section. 

• 3. Locate the page titled "5x5 Matrix." 

• 4. Copy the entire "5x5 Matrix" page. 

• 5. Paste it into your personal "Class Notes" section. 

• 6. Use the shading feature to fill in cells on the matrix and create your image. To shade a cell, left-click on it and select the shading option. 

• 7. Once your image is complete, take a screenshot of your matrix. 

• 8.Paste the screenshot as your answer. 

Open Ended

Consider the individual steps involved in lighting up each cell of a 5x5 matrix to form your image. 

Write the pseudocode for your image.

Remember, pseudocode is not actual code; it’s a plain-language description of the steps the computer needs to follow. 

Multiple Choice

from hub import light_matrix 
What is the purpose of the first line in the code?

• To create a new light matrix 

• To delete an existing light matrix 

• To import the light matrix module from the hub package 

• To initialize the light matrix with default settings 

Multiple Choice

import runloop (line 2)
Why do we import runloop in this program? 

• To create a continuous loop 

• To use specific functions that control program flow 

• To import all possible loops 

• To make the program run faster 

Multiple Choice

async def main(): (line 4)
What does the 'async' keyword indicate in this function definition? 

• The function runs synchronously 

• The function is a main function 

• The function will exit immediately 

• The function is asynchronous

Multiple Choice

light_matrix.show_image(light_matrix.IMAGE_HEART) (line 6)

What will happen when this line of code is executed?

• The light matrix will turn off all lights 

• The light matrix will display an image of a Heart

• The light matrix will print "IMAGE_HEART" as text 

• The light matrix will clear any images 

Multiple Choice

line 7
What is the function of 'await runloop.sleep_ms(5000)' in this code? 

• It causes the program to terminate after 5000 milliseconds 

• It creates a new thread that sleeps for 5000 milliseconds 

• It delays the execution of the subsequent line of code for 5000 milliseconds 

• It repeats the previous line of code every 5000 milliseconds 

Multiple Choice

line 8
light_matrix.clear()

What does light_matrix.clear() do in this context?

• It turns off all the lights in the light matrix 

• It clears the memory of the light matrix 

• It resets the light matrix to its default image 

• It prepares the light matrix for a new program 

Multiple Choice

line 9

Why do we call runloop.run(main()) at the end of the script?

• To compile the program 

• To execute the main function asynchronously 

• To enter an infinite loop 

• • To test the main function without running it