You are now going to practice a new strumming pattern using all the chords you have played so far.
This is to cement what you have learnt so far and allow you to branch out further as you continue your journey to learning more and more songs. These particular chords are used in 1000s of songs.
Set your metronome to 100 BPM and, once you can confidently and accurately play at this speed (along with Andy) you can start ramping up the speed further, making sure you have accurately played the piece at the previos slower pace.
Here is the sequence:
G//// Em//// C//// D//// G//// Em//// C//// Am//// Am//// D/ G/