/-  spider
/+  *ph-io
=,  thread=thread:spider
^-  imp:spider
|=  [=bowl:spider vase]
=/  m  (thread ,vase)
;<  az=iid:spider  bind:m  start-azimuth
;<  ~              bind:m  (spawn az ~bud)
;<  ~              bind:m  (real-ship az ~bud)
;<  ~              bind:m  end-azimuth
(pure:m *vase)