How do you check if a number value is three?

function checkPartsLeft()
while true do 
    local count = 0 
    local PartsLeft = Workspace.PartsLeft.Value
    if PartsLeft.Value == 3 then
        time.Value = 0 
end
end

What I am trying to do is to make a function where the game repeatedly checks if PartsLeft, which is a NumberValue, is three or less than three.