mech 0.3.4

Mech is a programming language for building reactive systems like robots, games, and animations.
Documentation 
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Traffic Signals
------------------

<color>  = 🟢 | 🔴 | 🟡
<signal> = 🚶‍♀ | ✋ | 🛑

(#🚦/north<color>, #🚦/east<color>) ?

  -- East light turns green, signal north crosswalk
  (🟡, 🔴) => 6<s> => (🔴, 🔴)
  (🔴, 🔴) => 2<s> => (🔴, 🟢)
  (🔴, 🟢) => #crosswalk/north? => (🔴, 🟡)

  -- North light turns green, signal east crosswalk
  (🔴, 🟡) => 6<s> => (🔴, 🔴) 
  (🔴, 🔴) => 2<s> => (🟢, 🔴)
  (🟢, 🔴) => #crosswalk/east? => (🟡, 🔴)

#crosswalk/north ?
  🚶‍♀️ => 20<s> => ✋
  ✋ => 10<s> => 🛑. 

#crosswalk/east ?
  🚶‍♀️ => 20<s> => ✋
  ✋ => 10<s> => 🛑.

Linearized Emojified
----------------------

(#🚦/north<color>, #🚦/east<color>) ?
  (🟡, 🔴) ~> 6<s> => (🔴,🔴) ~> 2<s> => (🔴, 🟢) ~> 30<s> => (🔴, 🟡)
  (🔴, 🟡) ~> 6<s> => (🔴,🔴) ~> (#crosswalk/north?,#crosswalk/north?) => (🟢, 🔴) ~> 30<s> => (🟡, 🔴)

#crosswalk/north ? 🚶‍♀️ => 20<s> => ✋ => 10<s> => 🛑.
#crosswalk/east ? 🚶‍♀️ => 20<s> => ✋ => 10<s> => 🛑.