Can someone help me figure this out?

Cast on 18 stitches.

Row 1: *K1, P1 repeat from * until end

Row 2: *K1, P1 repeat from * until end

Row 3: *P1, K1 repeat from * until end

Row 4: *P1, K1 repeat from * until end

These 4 rows form pattern – repeat until scarf measures c.150 cm.

So is it:

Cast on 18

K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P

K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P

P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K

P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K,P,K

The * have me confused