Sine Wave - Office of M. Scott Reynolds

Sine Wave for Node.js

Many years ago there was a program titled "SineWave" in a BASIC Language computer games book that I found entertaining. Here is a version of that program for Node.js.

var SPACES52 = "                                                    ";
var n = 0.0;
function tick() {
	var a = Math.trunc((26 + 25 * Math.sin(n)));
	var time = new Date();
	var h = time.getHours();
	var m = time.getMinutes();
	var s = time.getSeconds();
	var t = "";
	if (h < 10) {
		t += "0";
	}
	t += h + ":";
	if (m < 10) {
		t += "0";
	}
	t += m + ":";
	if (s < 10) {
		t += "0";
	}
	t += s;

	console.log(SPACES52.substr(1, a) + t);
	n += 0.25;
	setTimeout(tick, 1000);
}

setTimeout(tick, 1000);