Build AI Bot

First Step

1-create a file and we can called file01, and create another file called file02.
2-write a code it function is "copy the content of file01 to file02".
3-write a code it function is "copy the content of file02 to file01".

note 1 :
This copy codes contains two other codes
A-code to repeat the copy process.
B-code to complete copy process at a second.
how to do that?
note 2 :
Do not copy the entire contents of the two files, just copy part of the content like:
1-90% of memory content is copied.
or
2- If the content is 100 words, 90 words will be copied.