Presenting stimuli according to the experimental group

Hey everyone,

I'm new here and have a question... I was trying to design an experiment where, depending on the condition, a participant is in (according to their passcodes), I want the participants to watch one of two clips (according to their group).
I tried creating the conditions with a table, typing in the participants-codes in the first row and the condition in the second, trying to use "readkeys" and "if"-statements to show the respecitve videos, but that didn't work out... Does anyone have an idea what I can do instead or how to improve my coding?

Thank you for your answers!


My code:

table participants
"001" 1

"002" 2

"003" 1

"004" 2

"005" 1

"006" 2

"007" 1



task film

  show text "Type in the participant's number." 0 -200

  show rectangle 0 0 20 20 0 255 0

    readkeys option size 3

    readkeys option placeholders 30 30

  readkeys @1 60000

  clear screen

  delay 1000

  keys space

  show bitmap start

  readkey 1 60000

  if @2 ==  1

    show video a
    delay 9000
  fi

  if @2 == 2
    show video b

    delay 9000
  fi