American terminology used in this pattern:

Note Well, the starting 3chain on each row does NOT count as the first dc.

1. 4ch, 2dc in third chain fr0m the hook, 3ch turn.
2. 1dc in first dc, 2dc in next dc, 2dc in third of the 3ch turning chain, 3ch turn.
3. 1dc in first dc, 2dc in next dc, 1dc in each of next 2 dc, 2dc in next dc, 1dc in third of the 3ch turning chain, 3ch turn.
4. 1dc in first dc, 2dc in next dc, 1dc in each of next 5 dc, 2dc in next dc, 2dc in third of the 3ch turning chain, 3ch turn.
5. 1dc in first dc, 1dc in each of next 4 dc, miss 1 dc, 1sc in next dc, miss 1 dc, 1dc in each of next 4 dc, 2dc in third of the 3ch turning chain, 3ch turn.
6. 2dc decrease over first 2 dc, 2tr in each of next 2 dc, 2dc in next dc, skip 1 dc, slip stitch in next dc, skip 1 dc, 2dc in next dc, 2tr in each of next 2 dc, 2dc decrease over last 2 dc, 3ch, 1 slip stitch in the last dc of previous row.
7. Fasten off.