Why doesnt my @keyframe work?

Question

https://code.sololearn.com/W8IA2F2184Uu/?ref=app
Hi, i am a begginer in css an html. And I wanted to make a background changing animation but it does not work. Does anyone know the reason???
thanks!

Answer 1

@keyframes colorchange
@-webkit-keyframes colorchange

Answer 2

thanks !what a stupid mistake.

Answer 3

we are humans 👍👍👍