Everything is correct and your code has a good style due to the use of the background short hand. Well done!
Linear gradient i did so:
background: url("top-image.png") top no-repeat, url("bottom-image.png") bottom no-repeat, linear-gradient(to bottom, grey 0%, white 18%, white 83%, grey 100%);
Hi @lomocuzi and welcome to the community
Your version is also fine.
When the color are lacking percentage values (like in @Sarai_Atoche_Pascual version) they are spaced equally.
Hello @mikoMK, thank you for your contributions, I’m practing