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// Variant 0: Basic
var speed = 500,
    iterations = 5,
    index = 0;

(function interval () {
    // Do stuff...
    if (index++ !== iterations) setTimeout(interval, speed);
})();

// Variant 1: Wait for code execution to be possible
var speed = 100;

(function interval () {
    try {
        // code that throws an error message
    } catch (e) {
        setTimeout(interval, speed);
    }
})();