Help with Udf

I would like to split a string to an array of strings. So my input string could be "onetwothreefourfive" and and I want to create an output array by splitting the string by a specified length lets say by 3. So my output array should then look like the following.

one

two

thr

eef

our

fiv

e

Could someone maybe provide me with a UDF for this functionality?