So, I am having trouble with this proof and am not sure I understand.

Use Cantor's diagonal argument to show that the set of all infinite sequences of 0s and 1s (that is, of all expressions such as 11010001...) is uncountable.

I definitely understand what Cantor's diagonal argument is and I know what uncountable is, but I guess I just don't understand what or how to do the infinite sequences of 0s and 1s.

Thanks!