consider not introducing the for loop

[max-mapper]

https://github.com/OpenTechSchool/js-beginners-4h-workshop-1/blob/gh-pages/page3.html#L98-104

function rainbow(x, y) {
  var colors = ["red", "orange", "yellow", "green", "cyan", "purple", "white"];
  for (var count = 0; count < colors.length; count = count + 1) {
    color(colors[count]);
    circle(x, y, 150 - 5 * count);
  }
}

can be rewritten as

function rainbow(x, y) {
  var colors = ["red", "orange", "yellow", "green", "cyan", "purple",
  colors.forEach(function(color) {
    color(color)
    circle(x, y, 150 - 5 * colors.indexOf(color))
  })
}

since for loops are rather confusing for absolute beginners

[xMartin]

Not sure if passing a function that will be called multiple times is less confusing. We could try out this variant when a student has a hard time to get the for loop. Would be cool in general to collect some learn success data.

[janmonschke]

I'd also say that we should use sth. like forEach here on the first day and introduce loops on the second day in reference to this example maybe since a) the concept of for-loops is very complex for beginners and b) it introduces a lot of new syntax.