Did you add the CSS for font awesome?
https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css
Did you include the Font Awesome library in your Pen?
Also, just a quick typo, it’s “welcome”, not “wellcome”. 
no i didnt, but now i did it work, tq so much owel
no i didnt but now i did, tq so much joncosta, sorry about the word, im not good with english, but tq for that