Question: Given an input, output that input followed by a newline endlessly.

Input will be a string consisting only of printable ASCII characters (`0x20-0x7E`) and newlines (`0x0A`).

If input is length 0, endlessly output newlines.

This is [code-golf](/questions/tagged/code-golf "show questions tagged 'code-golf'") so fewest bytes **in each language** wins!

Answer: 
sed, 5
======

```
:      # label (unnamed) 
p      # print the pattern space
b      # branch back to the label

```

Unnamed labels is an undocumented "feature" in sed that works with version 4.2.2, but may not work in future versions.
Vim, 6 bytes
------------

Similar solution as the `V` answer.

```
Yqqp@q

```