I need ideas for a code generator :P
Add a code to create a curved line in css. You can look at this - https://jsfiddle.net/jonataswalker/s3vd2hny/.
Add something about gradients reference -
Gradient generator - https://cssgradient.io/ ,
Radial gradient - https://www.w3schools.com/css/css3_gradients_radial.asp , Linear Gradient - https://www.w3schools.com/css/css3_gradients.asp,
Conic Gradient - https://www.w3schools.com/css/css3_gradients_conic.asp.
Add something about border-radius in % and in px.
Add something about animations.
These were some ideas that I got.