how do i make a clickdetector execute a script?

local ClickDetector = script.Parent

ClickDetector.MouseClick:Connect(function()
    -- code
end)

runs on click

You can create a function for your code to be executed when the player clicked the detector. Then let the script listen for the MouseClick property of the clickdetector, and let it fire the function.

This is how your code would be like:

local detector = script.Parent

function disIsSupposedtobefired(player)
       print(player.Name.. ' has clicked the detector')
end

--you can fire the function like this

detector.MouseClick:Connect(disIsSupposedtobefired)

-- OR

detector.MouseClick:Connect(function(player)
        disIsSupposedtobefired(player)
end)