can someone help me with this code html/javascript

Hi,

I am new here on this forum and I have just started programming.

i try to make something but i dont know what to use. im stuck with the:
class="pijlen" (maybe i did it wrong)
i hope you guys can help me

what i want to do: The current values must be in a JSON file, this file is retrieved by the media players and the value that is shown on the matrix boards.

but now i want to make the values and connect them with my picture's so that if i pres on one picture (there is a button in the...

can someone help me with this code html/javascript

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