Rating Component - HTML, CSS and JS

Hey everyone! I just have two problems. My JS works, but the code itself is very repetitive I notice.(I don't know any JS libraries/frameworks yet) If someone has a way for me to simplify my code, I'll greatly appreciate it! My next problem is with the functionality of the rating buttons. So when I click on a number, it does what it's supposed to, but when I click on another number, they both turn the same color...Now this obviously isn't supposed to be happening, but I couldn't figure the JS out for it not to be repetitive, so again, I'll be more than happy if someone could help me with that! Overall, I'm hoping to get some feedback on the design itself, the HTML/CSS I used. Would anyone do anything different or more efficient to what I did (specifically for the HTML and CSS portion)