How to decode python base64?

Question

There are a total of 4 codes.

I0ltcG9ydGluZyBNb2R1bGVzCmltcG9ydCByZXF1ZXN0cwoKI0ltcG9ydGluZyBNaSBGdW5jLi4uCmZyb20gRGF0YWJhc2UuVGltZXIgaW1wb3J0IGNsZWFyCmZyb20gRnVuY3Rp