changing attributes with click but querySelector

I’ve written this to change the background of a div that represents hours on a daily planner. the first instance (onclick) works but the others don’t. Do I need to give each .container their own ID? and their own function?

var changeStatus = document.querySelector("#changeStatus");
var container = document.querySelector(".container");

changeStatus.addEventListener("click", function () {
  container.setAttribute("class", "filled");
}

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