For anyone struggling with this and tried to look it up, I got it-

the answer that was posted wasn’t exactly the right one.

What you actually needed to do was this,

; To show the turtle’s position

showturtle

; This to make the circle for reference

repeat 36

right 10

draw 5

; THIS is the important part. This is to remember the position it’s in after every VERTEX OF THE CIRCLE

REMEMBER

next

; This is the half circles being drawn

repeat 40

draw 5

right 10

GO HALF

; THIS is the second part that’s important. This is so it goes back to the next vertex position each time

GOBACK

next

end

; THIS IS THE HALF CIRCLE METHOD/SUBROUTINE

# HALF

repeat 18

right 10

draw 10

next

return