Hi! Ralf Gesellensetter wrote: > she failed implementing Koch-curves or fractals. # preparing... reset canvassize 300,301 direction 90 # recursive definition learn snow x [ if x == 0 [ fw 10 ] else [ snow x-1 tl 60 snow x-1 tr 120 snow x-1 tl 60 snow x-1 ] ] # GO! go 0,50 snow 1 go 0,150 snow 2 go 0,250 snow 3