text: --- 
  --- 
  __--__----- 
  ---- 
  
  //------ 
  
  -- 
  -- 
  ---- 
  --_-__-- 
  ------ 
  ------- 
  ---_
  --- 
  --- 
  ----- 
  ---_
  -- 
  _---- 
  ---__- 
  
  .,,,,,,,,,,l--~- 
  
  CONVERGING 
  
  DECREASING VELOCITY 
  INCREASING PRESSURE 
  CONSTANT DENSITY  INCREASING VELOCITY 
  DECREASING PRESSURE 
  CONSTANT DENSITY 