[Fluxus] turtle draw-instance

[gabor papp]

i encountered a strange problem with draw-instance when used with
objects build with the turtle. in the attached code i tried to build a
square and draw it three times, but only one is displayed. am i missing
something?

(clear)
(hint-unlit)

(define (build-square)
    (turtle-reset)
    (turtle-prim 1)

    (for ([i (in-range 4)])
        (turtle-vert)
        (turtle-move 1)
        (turtle-turn (vector 0 0 90)))

    (turtle-build))

(define s (build-square))

(with-state
    (translate (vector 2 0 0))
    (draw-instance s))

(with-state
    (translate (vector 4 0 0))
    (draw-instance s))

best,
gabor