How to make League of Legends border

Hello, the boundary in League of Legends was the symbol of last season's stage. For example, it's S4 now, and the silver border you see now is a sign that S3 season has reached the silver level.

If you don't have a border now, it means that you didn't participate in the S3 season qualifiers and reached the silver level or above. If you want to get the border, you must qualify in S4 season and reach the silver level or above, and then you will get the border after S4 season.