Need some help correcting this code?

Question

I want to be able to have it so when you click the button, the <div> box will choose from an array that I assigned to a variable at random
https://code.sololearn.com/Wa8uRcw9a9tp/?ref=app

Answer 1

var colors = ["green", "blue", "red", "purple", "orange", "yellow"];
onload = function() {
button = document.getElementById("changeBox");
box = document.getElementById("dBox");
button.onclick = function() {
box.style.background = colors[Math.round(Math.random()*5)];
};
}

Answer 2

thank you