Unit 6 Lesson 12 additional challenge


My students didn’t quite grasp how the index is used in a for loop or how to manipulate it to get different output from their arrays. I used Lesson 12 as the start for this challenge and had them rewrite a changeColor() function to be called with two color parameters. Set alternating LEDs with one color and the rest with another color.
I also reviewed the following code snippets with them before they started the challenge.

//print even numbers 0,2,4,6,8    
for (var i = 0; i < 10; i = i+2){

//print odd numbers 1,3,5,7,9
    for (var i = 0; i < 10; i=i+2){

Remix the code using the link below and complete the task listed in the comments. Submit the link to your remixed app.

  • CSD Challenge: Here is the code you created in Unit 6 Lesson 12.
  • Rewrite the function changeColor() to take a second color parameter.
  • Set the LEDs with odd numbered indexes to the first color.
  • Set the LEDs with even numbered indexes to the second color.
  • Here is how the function should work.
    • If the user clicks the “Red” button all the color LEDs should be set to red.
    • If the user selects “Red Green”, the second, fourth, sixth, eighth, and tenth LEDs should be red; the first, third, fifth, seventh, ninth LEDs should be set to green.
  • You MUST use ONLY one for loop in the changeColor() function to set the colors of the LEDs.

Do This:

  • Add event handlers for the new UI buttons and call the changeColor() function with the appropriate values.
  • Don’t forget to change the other calls in the starter code to changeColor() function to include the second parameter.

CSD:U6L12-Challenge - App Lab [Starter Code Link]




This is great! I love making additional challenges when students are struggling, plus the non-struggling students like to show off what they know. Great work!