How to keep a button not disappearing on the screen?

Hello all,

I am working on a Corsi task adapting a pre-made library and I noticed that the 'DONE' button disappeared during the task. Is there anyone who can help me with keeping this button not disappearing on the screen?


Best,
Gyu-Ho


[test link] www.psytoolkit.org/c/3.4.0/survey?s=SJYKr



options
 mouse on
 origin topleft
 set &Count 2 # starts with showing two blocks

bitmaps
 yellow
 purple
 done
 ticked
 correct
 wrong
 instructions
 ready1
 ready2
 ready3
 
fonts
 arial 30

sounds
 gosignal go.mp3

part delay
 delay 500
 clear -1
 delay 500

table corsidata
 include corsitable.txt

task corsi
 table corsidata
 # mouse off so that people cannot mouse during sequence presentation
 mouse off
 # show nine purple blocks
 show bitmap purple @1 @2
 show bitmap purple @3 @4
 show bitmap purple @5 @6
 show bitmap purple @7 @8
 show bitmap purple @9 @10
 show bitmap purple @11 @12
 show bitmap purple @13 @14
 show bitmap purple @15 @16
 show bitmap purple @17 @18
 show bitmap done 750 550
 # now we are going to highlight some of the blocks (in yellow)
 # there will always at least be two yellow blocks
 # more yellow blocks depends on where we are in the expetiment (&Count)
 part delay
 show bitmap yellow @19 @20
 part delay
 show bitmap yellow @21 @22
 part delay
 if &Count > 2
   show bitmap yellow @23 @24
   part delay
 fi
 if &Count > 3
   show bitmap yellow @25 @26
   part delay
 fi
 if &Count > 4
   show bitmap yellow @27 @28
   part delay
 fi
 if &Count > 5
   show bitmap yellow @29 @30
   part delay
 fi
 if &Count > 6
   show bitmap yellow @31 @32
   part delay
 fi
 if &Count > 7
   show bitmap yellow @33 @34
   part delay
 fi
 if &Count > 8
   show bitmap yellow @35 @36
   part delay
 fi
 # go!
 sound gosignal
 mouse show  # now show cursor again
 #delay 100   # not really necessary, but gives a bit of time between sound and people's response
 # read in sequence
 while $x != 10
   readmouse l 1 10000 range 1 10
   set $myMouseX MOUSE_X
   set $myMouseY MOUSE_Y
   set $x under $myMouseX $myMouseY up range 1 10
   if $x != 10
     set $counter increase
   fi
   if $counter == 1 && $x != 10
     set $b1 $x
   fi
   if $counter == 2 && $x != 10
     set $b2 $x
   fi
   if $counter == 3 && $x != 10
     set $b3 $x
   fi
   if $counter == 4 && $x != 10
     set $b4 $x
   fi
   if $counter == 5 && $x != 10
     set $b5 $x
   fi
   if $counter == 6 && $x != 10
     set $b6 $x
   fi
   if $counter == 7 && $x != 10
     set $b7 $x
   fi
   if $counter == 8 && $x != 10
     set $b8 $x
   fi
   if $counter == 9 && $x != 10
     set $b9 $x
   fi
   show bitmap ticked $myMouseX $myMouseY ## it has to be here, check while-end javascript coding
 while-end
 set $x 0
 # now check if sequence is correct
 set $SeqCorrect 0 # this means wrong
 if $counter == &Count
   if &Count == 2 && $b1 == @37 && $b2 == @38
     set $SeqCorrect 1
   fi
   if &Count == 3 && $b1 == @37 && $b2 == @38 && $b3 == @39
     set $SeqCorrect 1
   fi
   if &Count == 4 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40
     set $SeqCorrect 1
   fi
   if &Count == 5 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40 && $b5 == @41
     set $SeqCorrect 1
   fi
   if &Count == 6 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40 && $b5 == @41 && $b6 == @42
     set $SeqCorrect 1
   fi
   if &Count == 7 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40 && $b5 == @41 && $b6 == @42 && $b7 == @43
     set $SeqCorrect 1
   fi
   if &Count == 8 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40 && $b5 == @41 && $b6 == @42 && $b7 == @43 && $b8 == @44
     set $SeqCorrect 1
   fi
   if &Count == 9 && $b1 == @37 && $b2 == @38 && $b3 == @39 && $b4 == @40 && $b5 == @41 && $b6 == @42 && $b7 == @43 && $b8 == @44 && $b9 == @45
     set $SeqCorrect 1
   fi
 fi
 ## feedback (a smiley or frowney face in bottom right corner)
 if $SeqCorrect == 1
   show bitmap correct 750 550
 fi
 if $SeqCorrect == 0
   show bitmap wrong 750 550
 fi
 delay 1000
 clear -1
 delay 1000
 ## now goto next seq if correct twice
 set $currentcount &Count
 if $SeqCorrect == 1
   set &corsispan &Count ## the best score so far
   set &Count increase
   set &ErrorCount 0    
 fi
 ## count errors in a row
 if $SeqCorrect == 0
   set &ErrorCount increase
 fi
 ## save data
 save &corsispan $currentcount $SeqCorrect TABLEROW
 ## if two errors in a row or if all are correctly clicked, end of task
 if &ErrorCount == 2 or &Count == 10
   end tasklist
 fi

block test
 message instructions
 bitmap ready3
 delay 1000
 bitmap ready2
 delay 1000  
 bitmap ready1
 delay 1000  
 tasklist
   corsi 1000 all_before_repeat
 end
 feedback
   text 0 400 &corsispan ; prefix "Your Corsi span is " ; postfix " items."
   text 0 500 "Press space bar to continue"
 end