input geometriesyr16; figure(0,0,11u,3u); trace grille(0.5) withcolor blanc; origine((1,1)); drawarrow placepoint(-1,0)--placepoint(29,0) withpen pencircle scaled 1.5bp; marque_p:="plein"; for k=0 upto 21: pointe(placepoint(k,0)); endfor; label.bot(btex 0 etex,placepoint(0,0)); label.bot(btex 1 etex,placepoint(10,0)); label.bot(btex 2 etex,placepoint(20,0)); drawarrow placepoint(8,3)--placepoint(8,1); label.top(btex \dots etex,placepoint(8,3)); drawarrow placepoint(16,3)--placepoint(16,1); label.top(btex \dots etex,placepoint(16,3)); drawarrow placepoint(4,3)--placepoint(4,1); label.top(btex 0,4 etex,placepoint(4,3)); fin; end