anchor.diff:  
   [source,clojure]
   ----
  -(def schedule (t/schedule println timeline))
  +(def schedule (tick.schedule/schedule println timeline))
   
  -(t/start schedule (t/clock-ticking-in-seconds))
  +(tick.schedule/start schedule (tick.clock/clock-ticking-in-seconds))
   ----
   
   You can `stop`, `pause` and `resume` schedules too.
  
positive.code: 
  [source,clojure]
  ----
  (require '[tick.cal :refer [easter-fridays]])
  
  (def holidays
    (interleave-timelines
      (timeline (bank-holiday-mondays))
      (timeline (easter-fridays))))
  ----
  
  == Schedules
  
negative.code: 
  [source,clojure]
  ----
  (def simulator (tick.schedule/simulate println timeline))
  
  (tick.schedule/start simulator (tick.clock/fixed-clock ...))
  ----
  
  If you want to wait for a ticker to complete its journey over a
  