package {
	import flash.display.Sprite;
	import flash.events.Event;
	
	[SWF(backgroundColor = "0x000000", frameRate = "30", width = "465", height = "465")]
	public class LineArt extends Sprite {
		
		private var _lines :/*Line*/Array = [];
		
		public function LineArt() { addEventListener(Event.ENTER_FRAME, _enterFrame); }
		
		/* ENTER FRAME */
		private function _enterFrame ( evt :Event ) :void {
			
			// クリア & 背景描画
			graphics.clear();
			graphics.beginFill(0x0); graphics.drawRect(0, 0, 465, 465); graphics.endFill();
			
			// Line 生成
			_lines.push(new Line());
			
			// Line 更新
			for (var i :int = 0; _lines[i]; i++) if (_lines[i].update(graphics)) _lines.splice(i, 1)[0] = null;
		}
	}
}

import flash.display.Graphics;
import flash.utils.getTimer;

class Line {
	/* 分割数 */
	private const SEP :int = 12;
	
	private var _nstart :int;
	private var _nend   :int;
	
	private var _offsetY :int;
	
	private var _dw :Number;
	private var _dh :Number;
	private var _dd :Number;
	
	private var _thick  :int;
	private var _speed :int;
	
	public function Line () {
		_nstart = _nend = 0;
		_offsetY = Math.random() * 465;
		
		_dw = 465 / SEP;
		_dh = Math.random() * 77 + 15;
		_dd = Math.random() * 0.3 + 0.1;
		
		_thick = Math.random() * 4;
		_speed = Math.random() * 200 + 300;
	}
	
	public function update ( g :Graphics ) :Boolean {
		
		if (_nend < SEP) _nend ++; else _nstart ++;
		
		// 終了
		if (SEP == _nstart) return true;
		
		g.lineStyle(_thick, int(Math.random() * 0xffffff), 0.9);
		
		for (var i :int = _nstart; i <= _nend; i ++) {
			var px :int = 465 - _dw * i;
			var py :int = Math.sin(getTimer() / _speed + i * _dd) * _dh + _offsetY;
			
			if (i != _nstart) g.lineTo(px, py); else g.moveTo(px, py);
		}
		return false;
	}
}

Line Art