I am pretty new to javascript and I want to change the Margin-Top to 3vw instead of 1vw when the screen-size is smaller than 759px.

function myFunction() {
  var y = document.getElementById("color");
  var z = document.getElementById("color_text");
  

  if (y.style.opacity === "1") {
    y.style.opacity = "1";
    z.style.marginTop = "0vw";
    
  } else {
    y.style.opacity = "0";
    z.style.marginTop = "1vw";
    
  }
}