[BUG] Working with Light Course stops rendering and glitches out

[jf-kelly]

Bug Description:
When you do the Working with Light course on MYR, it works up until the step that says Indicator (2/2). If you progress past this step, then come back to it, every step will then be glitched out.

Steps To Reproduce:
Steps to reproduce the behavior:

1. Go to learnmyr.org
2. Click on 'Courses'
3. Scroll down to 'Working with Light'
4. Keep clicking 'Next Lesson' until you reach 'Indicator (2/2)'
5. Click 'Next Lesson', and then click 'Previous Lesson'

Expected behavior:
The course should go on as the code is written, however it keeps the light from a previous lesson and stops rendering the code entirely.

Screenshots:

URL(s):
https://learnmyr.org/course/light

Desktop:

• OS: Windows
• Browser: Chrome

[jf-kelly]

Upon further investigation, the problem is not only with the course, but with the light indicator feature, as any time the light indicator is turned on, the page will glitch and freeze.