Sure! Here's a simple four-chord progression in standard tuning using the chords G, Em, C, and D. This is a very common progression found in many popular songs.
``` 
G Chord:
e|---3---|
B|---0---|
G|---0---|
D|---0---|
A|---2---|
E|---3---|

Em Chord:
e|---0---|
B|---0---|
G|---0---|
D|---2---|
A|---2---|
E|---0---|

C Chord:
e|---0---|
B|---1---|
G|---0---|
D|---2---|
A|---3---|
E|---X---|

D Chord:
e|---2---|
B|---3---|
G|---2---|
D|---0---|
A|---X---|
E|---X---|
``` 
Strumming pattern:

For the strumming pattern, you can use a simple down-down-up, up-down-up pattern (D-DU-UDU). This pattern can be played once for each chord, as follows:

1. G Chord: D-DU-UDU
2. Em Chord: D-DU-UDU
3. C Chord: D-DU-UDU
4. D Chord: D-DU-UDU

Repeat this progression and strumming pattern as desired. You can also experiment with different strumming patterns and rhythms to create various styles and feels.
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