code feat

(switch to desktop mode for better experience)  # html code : <! DOCTYPE   html > < html   lang = "en" > < head >      < link   href = 'E:\html\testpro\style.css'   rel = 'stylesheet' >      < meta   charset = "UTF-8" >      < meta   http-equiv = "X-UA-Compatible"   content = "IE=edge" >      < meta   name = "viewport"   content = "width=device-width, initial-scale=1.0" >      < title > progress bar </ title > </ head > < body >      < div   class = "box" >          < h1 >< u > progress bar </ u > : </ h1 >          < h2   id = 'h1' > c </ h2 >              < span   class = 'c'   id = 'bar1' ></ span >          < h2   id = 'h2' > c++ </ h2 >              < span   class = 'cpp'   id = 'bar2' ></ span >          &