var queue = [];
var isCommandRunning = false;

// show the debug window by pressing the "d" key
window.addEventListener("keyup", function(evt) {
	if(evt.keyCode == 68) {
		document.documentElement.classList.toggle("is-debug-mode");
	}
}, false);

// preset buttons
var presets = document.querySelectorAll(".preset-btn");
for(var i=0;i