Thank you so much Pratik! It worked!
I would also like to create a black line under: “meest recente berichten” ( the text should be 1 line, instead of tw0) and “Recente reacties”. What would be the code for that?
Thereby, I would like to have a black line above the footer and the footer should be a bit smaller.
And, at last, I would like to have a frame around very post seperately.
Thank you so much for helping!