Instructions:

Stitches and abbreviations used:
Sc – single crochet
Ch - chain
Hdc – half dc
Dc - double crochet
Sl st – slip stitch
Rnd - round

Ch 2, join with a sl st to form a ring

Rnd 1: Ch 3 (counts as first dc here and throughout the square),
2 dc in ring, (ch 2, 3 dc in ring) 3 times, ch 1, join with a hdc
in the third ch of beginning ch 2 on previous rnd.

Rnd 2: Ch 3, dc in same sp, dc in next st, ch 1, sk 1 dc, dc in
next dc, * (2 dc, ch 2, 2 dc) in next ch-2 sp, dc in next dc, ch 1,
sk 1 dc, dc in next dc.  Repeat from * twice. In last space, make
2 dc, ch 1; join with a hdc in the third ch of beginning ch 2 on
previous rnd.

Rnd 3: Ch 3, dc in same sp, dc in next 3 dcs, ch 1, sk 1 dc, dc
in next 3 dc’s, * (2 dc, ch 2, 2 dc) in next ch-2 sp, dc in next
3 dc’s, ch 1, sk 1 dc, dc in next 3 dc’s.  Repeat from * twice.
In last space, make 2 dc, ch 1; join with a hdc in the third ch
of beginning ch 2 on previous rnd.

Rnd 4: Ch 3, dc in same sp, dc in next 5 dcs, ch 1, sk 1 dc, dc
in next 5 dc’s, * (2 dc, ch 2, 2 dc) in next ch-2 sp, dc in next
5 dc’s, ch 1, sk 1 dc, dc in next 5 dc’s.  Repeat from * twice.
In last space, make 2 dc, ch 1; join with a hdc in the third ch
of beginning ch 2 on previous rnd.

Rnd 5: Ch 3, dc in same sp, dc in next 7 dcs, ch 1, sk 1 dc, dc
in next 7 dc’s, * (2 dc, ch 2, 2 dc) in next ch-2 sp, dc in next
7 dc’s, ch 1, sk 1 dc, dc in next 7 dc’s.  Repeat from * twice.
In last space, make 2 dc, ch 1; join with a hdc in the third ch
of beginning ch 2 on previous rnd.

Rnd 6: Ch 3, dc in same sp, dc in next 9 dcs, ch 1, sk 1 dc, dc
in next 9 dc’s, * (2 dc, ch 2, 2 dc) in next ch-2 sp, dc in next
9 dc’s, ch 1, sk 1 dc, dc in next 9 dc’s.  Repeat from * twice.
In last space, make 2 dc, ch 1; join with a hdc in the third ch
of beginning ch 2 on previous rnd.

Rnd 7: Ch 3, dc in same sp, *dc in next 7 dcs, ch 1, sk 1 dc,
dc in next dc, ch 1, sk 1 dc, dc in next dc, ch 1, sk the ch-1
sp, dc in next dc, ch 1, sk 1 dc, dc in next dc, ch 1, sk 1 dc,
dc in next 7 dc’s, (2 dc, ch 2, 2 dc) in next ch-2 sp. Repeat
from * twice; dc in next 7 dcs, ch 1, sk 1 dc, dc in next dc,
ch 1, sk 1 dc, dc in next dc, ch 1, sk the ch-1 sp, dc in next
dc, ch 1, sk 1 dc, dc in next dc, ch 1, sk 1 dc, dc in next 7
dc’s.  In the last space, make 2 dc, ch 1; join with a hdc in
the third ch of beginning ch 2 on previous rnd.

Rnd 8: Ch 3, dc in same sp, *dc in next 13 sts, ch 1, sk the ch-1
sp, dc in next 13 dc, *(2 dc, ch 2, 2 dc) in the next ch-2 sp,
dc in next 13 dc’s, ch 1, sk 1 dc, dc in next 13 dc’s.  Repeat
from * twice. In last space, make 2 dc, ch 1; join with a hdc in
the third ch of beginning ch 2 on previous rnd.

Rnd 9: Ch 3, dc in same sp, *dc in next 15 sts, ch 1, sk the ch-1
sp, dc in next 15 dc, *(2 dc, ch 2, 2 dc) in the next ch-2 sp, dc
in next 15 dc’s, ch 1, sk 1 dc, dc in next 15 dc’s.  Repeat from *
twice. In last space, make 2 dc, ch 1; join with a hdc in the third
ch of beginning ch 2 on previous rnd.

Rnd 10: Ch 2, dc in same sp, dc in each dc and ch-1 space to the
next corner, *(2 dc, ch 2, 2 dc) in the corner ch-2 sp, dc in each
dc and ch-1 space to the next corner.  Repeat from * twice, (2 dc,
ch 2) in the last corner space.  Finish off.