There are three levels to OCD in Chapter Five, and a final level that is very easy to complete. Once OCD is achieved on the first three levels, the achievement will unlock.
The videos below are examples of how to OCD the levels. They may not be the fastest or easiest ways to get OCD on the levels, but they will give you ideas on how to OCD the level.
The key to this game is patience, so take your time since there is no time limit
*Note: The videos are not mine.*