Ill check the song out.
But is my diagram of poly(butene) correct ? because i followed the same method that A@di just explained.
yes ari , that shud be correct..
but lemme suggest u something
always...a methyl group i.e

is better to show in a polymer than an ethyl i.e

or any other alkyl
for that just make one more CH2 and insttad of an ethyl hanging make it to a methyl