Kendra Little has a few Github gists showing how to configure the blocked process report:
I wanted a friendly way to share code to configure and manage the Blocked Process Report, so I’ve created a gist on GitHub sharing TSQL that:
Enables the Blocked Process Report (BPR)
Collects the BPR with an Extended Events trace
Collects the BPR using a Server Side SQL Trace (in case you don’t care XEvents or are running an older version of SQL Server)
Lists out the Extended Events and SQL Traces you have running, and gives you code to stop and delete traces if you wish
Click through for the code.