I forgot to post this sooner, sorry. With the Colorblock quilt, I had a hard time deciding what to quilt. I defaulted to what the pattern samples show and what most people did, at least according to all the pics I found.
It’s boring but it works. Up and down on the tall strip and back and forth on the horizontal blocks.
Funnily enough, when I did mark these, the width of my chalk was just enough to make the lines slightly over 1″ apart and a little off by the time I get to the other side of the block. But the recipient won’t care. 😉
And yes I did mark these and not use a guide or eyeball it.