Mobile Coding Problem

I m using my Mobile to learn coding so far…but now i m stucked when i m trying to do projwcts cause i dont know where i can code in mobile.

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User Agent is: Mozilla/5.0 (Linux; Android 8.1.0; vivo 1716) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Mobile Safari/537.36.

Challenge: Build a Tribute Page

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you can use codepen also in mobile, it is responsive, and the editor has all the functions even in mobile version