     ctx.moveTo(@x, @y)
     ctx.lineTo(@child0.x, @child0.y)
     ctx.moveTo(@x, @y)
-    ctx.lineTo(@child1.x, @child0.y)
+    ctx.lineTo(@child1.x, @child1.y)
     ctx.stroke()
     ctx.restore()
 

    @nodes = ( n for n in @nodes when n isnt node0 and n isnt node1 )
    newnode = new Inner(node0.value + node1.value, node0, node1)
    newnode.x = (node0.x + node1.x) / 2
    newnode.y = (node0.y + node1.y) / 2 - Math.abs(node0.x - node1.x)
    @nodes.push(newnode)

# render loop

      fn(@child0)

    if @child1.forAll?
      @child1.forAll(fn)
    else
      fn(@child1)

