Make a dark green circle using rough layered pen strokes.
Blend and add texture by overlaying green and white pen marks.
Once your wreath is dry use the red pen to draw lines around the ring, like it is wrapped around the wreath. Once you have covered the wreath with red lines draw dashes along the lines to create the look of tinsel.
Add coloured baubles in-between the tinsel garland.
Use a white Posca to add in highlights on the garland and baubles.