Shape Raglan

Hi again, trying to understand this instruction. Work 4 rows dec 1 st at each end of next and foll 0 row. I understand to knit the 4 rows and after that nothing. My question is do I do a dec at the 4 row or not at all? Thanks for your help.

Skip any direction that has a 0 or a - or an X for your size. Go straight on to the next step.

What is the name of your pattern?

Matinee Coat and Helmet in King Cole Baby 4 ply - UKHKA18pdf - Thank you!