text t2 100 100 "queue q1 20 150 5 one two three four five cyan magenta" transparent
changeParam t2 point 14

text t4 10 20 L transparent
text t5 150 20 I transparent
text t6 290 20 L transparent
text t7 420 20 O transparent
groupObject LILO 4 t4 t5 t6 t7 
changeParam t4 point 24
changeParam t5 point 24
changeParam t6 point 24
changeParam t7 point 24
text t8 25 20 ast transparent
text t9 155 20 n transparent
text t10 305 20 ast transparent
text t11 440 20 ut transparent
groupObject LILO2 4 t8 t9 t10 t11
changeParam t4 point 24
changeParam t5 point 24
changeParam t6 point 24
changeParam t7 point 24

text t0 0 50 "Here is an example of a queue:" black
changeParam t0 point 16
delay 1000

begin
  changeParam t0 color transparent
  queue q1 180 150 5 one two three four five violet violet
end

text t1 0 50 "The following command line creates the queue:" black
changeParam t1 point 16
delay 1000

begin
  changeParam t1 color transparent
  changeParam t2 color blue
end

text t12 0 50 "There are two command options for queues:" black
changeParam t12 point 16
delay 500

begin
  text eq 315 50 ENQUEUE cyan 16
  text and 400 50 and black 16
  text dq 430 50 DEQUEUE cyan 16
  delay 1000
  changeParam t12 color transparent
  changeParam and color transparent
end

begin
  moveRelative eq -250 115
  moveRelative dq -90 115
end

begin
  changeParam LILO color magenta
  delay 1000
  changeParam LILO2 color blue
  text t13 0 50 "The last queue element entered will be the last element to leave." black
  changeParam t13 point 16
end

begin
  changeParam t13 color transparent
  changeParam LILO color transparent
  changeParam LILO2 color transparent
end

text t14 0 50 "Watch what happens when the queue is dequeued:" black
changeParam t14 point 16

delay 1000

begin
  text t15 100 120 "dequeue ql" transparent
  changeParam t15 color deeppink
  changeParam t15 point 14
end

delay 1000
dequeue q1
changeParam t15 color blue
changeParam t14 text "'one' was the first element removed because it was the first one added" deeppink
changeParam t14 color transparent
delay 1000

text t17 0 50 "Now watch what happens when the queue is enqueued:" black 16
delay 1000
begin
  text t18 100 140 "enqueue q2 six" transparent
  changeParam t18 color deeppink
  changeParam t18 point 14
changeParam t17 color transparent
end

delay 500
enqueue q1 six
changeParam t18 color blue
changeParam t14 text "'six' was added to the back of the queue" deeppink
changeParam t14 color black 
delay 1500
groupObject g1 3 q1 eq dq
begin
  moveRelative g1 0 20
  delay 1500
end

delay 1000
changeParam t14 color transparent
changeParam t17 text "Look at the command line that creates the queue:"
delay 2000
changeParam t17 color black
changeParam t17 text "Now look at the queue itself:"
delay 2000
changeParam t17 text "Note that the entries for the queue are in reversed order:"
delay 2000
changeParam t17 text "Remember when specifying elements in the queue command line:"
delay 2000
changeParam t17 text "The front of the queue is the left side and the back is the right."

delay 1000
text t21 175 350 "END OF DEMO" black 18