AKA solid shells
Chain a multiple of 6 + 1 ch
Row 1: 2dc in fourth ch from hook (3 skipped chs count as first dc), skip next 2 chs, sc in next ch, *[skip next 2 chs, 5dc in next ch, skip 2 chs, sc in next ch], repeat from * to end of row.
Note: From here on you will be crocheting through the back loops only. This is what makes the raised shells.
Row 2: ch3 (counts as first dc), turn, 2dc in first sc, skip next 2dc, sc in next dc, *[skip next 2dc 5dc in next sc, skip next 2dc, sc in next dc], repeat from * accross.
Repeat row 2 for pattern.