Use Green for ‘Shamrock’ Coasters.
Use Pink or Red for Valentine Coasters.

The multi-colored skeins yield 5 coasters per skein.
The solid colored skeins yield 7 coasters per skein.
Visit my blog for photos of special stitch in round 4.

Note: the 1/2 double-crochet stitch is not a half double crochet (hdc) stitch - it is more like ‘dc2tog’ stitch. See photos to the left and more details in the pattern pdf.