Iterated Logistic function with two initial conditions

globals [   ;; seting globals for two separate lists for
mylist-1    ;; two different initial conditions
mylist-2
]

to setup ;; setting two separate lists with their initial conditions
  ca
  set mylist-1 list (0) (X1)
  set mylist-2 list (0) (X2)
  reset-ticks
end 

to go                                         ;; procedure of iteration
  if r-parameter > 4 or X1 > 1 or X2 > 1 [    ;; with the results added to respective list
    ask patch 350 7
    [ set plabel "ERROR: R must be between 0 and 4.0 // X1 and X2 must be between 0 and 1.0."
      set plabel-color yellow ]
    stop
  ]
  set mylist-1 lput result-1 mylist-1 ;; bulding up lists as a result of iterations
  set mylist-2 lput result-2 mylist-2

  if ticks >= Num-iterations [ stop ] ;; stopping the model once
                                      ;; the inputted number of iterations is acheived
  tick
end 

to-report result-1                                         ;; procedure of iteration
  report  r-parameter * last mylist-1 * (1 - last mylist-1)
end 

to-report result-2
    report  r-parameter * last mylist-2 * (1 - last mylist-2)
end