html and css
<! DOCTYPE html > < html lang = "en" > < head > < title > practice set 1 </ title > < link rel = "stylesheet" href = "style.css" > </ head > < body > <!-- <div id="box"> my name is ibrahim kahell and i am in the college of dacg poletechenic and i am good student and toper of the class --> <!-- </div> --> < h1 class = "heading" > heading a </ h1 > < h2 class = "heading" > heading b </ h2 > < h3 class = "heading" > heading c </ h3 > < button style = "background-color:blue;" > click </ button > </ body > </ html > css script button { background-color : green ; <! DOCTYPE html > < html lang = "eng" > < head > < title > portfilo </ title > ...