Half Granny Square Pattern

ch4, join with ss into loop

rnd 1: ch3, 2dc into loop, ch 3, 3dc into loop

rnd 2: ch3 turn, 2dc into last dc of previous round, ch1, (3dc, ch3, 3dc) into corner, ch

1, 3dc into ch3 from previous round

rnd 3: ch3, turn, 2dc into last dc of previous round, ch1, 3dc into ch1sp, ch 1, (3dc,

ch3, 3dc) into corner, ch 1, 3dc into ch1sp, ch1, 3dc into ch3 from previous round

rnd 4: ch3, turn, 2dc into last dc of previous round, ch1, 3dc into ch1sp, ch 1, 3dc into

ch1sp, ch 1, (3dc, ch3, 3dc) into corner, ch 1, 3dc into ch1sp, ch1, 3dc into ch1sp, ch 1,

3dc into ch3 from previous round

Continue in this fashion until your half granny is the size you want.
Fasten off.