JS1k: The JavaScript code golfing competition

// JS1K ヽ(*⌒∇⌒*)ﾉ

S = b.querySelectorAll("script")[1].innerHTML.split("\n");

so = 0; fs = "fillStyle";
lo = 1; ln = "length";

c.width = W = innerWidth;
c.height = H = S.length*20;

b.style.margin = 0;
b.style.background = "#000";
b.style.overflow = "hidden";

a.textBaseline = "top";
a.font = "12px monospace";

x = setInterval(function() {
	a.globalCompositeOperation = "source-over";
	a.shadowBlur = 0; a[fs] = "rgba(0,0,0,0.4)";
	a.fillRect(0,0,W,H);

	a.shadowColor = "rgba(0,255,0,0.5)";
	a.shadowBlur = 10; a[fs] = "#060";
	a.globalCompositeOperation = "lighter";

	S.forEach(function(v, i) {
		if (i <= lo) {
			if (i == lo) { v = v.substr(0, so); }
			a.fillText(v, 100, 100+i*16);
		}
	});

	a[fs] = "#0f0";
	a.fillRect(100+a.measureText(S[lo].substr(0, so)).width, 102+lo*16, 10, 14);
	so++;

	if (so >= S[lo][ln]) { lo++; so = 0; }
	if (lo*16 > innerHeight-200) { a.translate(0, -0.5); }
	if (lo >= S[ln]-1) { window.clearInterval(x); }
}, 25);

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