Source of https://draw.tsak.net/viewer.swf. This loads a drawings movements and then replays it.

viewer.as

movie 'viewer.swf' {
// flash 6, total frames: 1, frame rate: 12 fps, 640x480 px, compressed

  frame 1 {
    function isLoaded(ref) {
      if (ref.getBytesLoaded() > 20 && ref.getBytesLoaded() == ref.getBytesTotal()) {
        return true;
      } else {
        return false;
      }
    }

    function getPercentage(lBytes, tBytes) {
      if (tBytes > 0) {
        return Math.round((lBytes / tBytes) * 100);
      } else {
        return 0;
      }
    }

    function paint(ref) {
      if (_root.thumb == 'true') {
        i = 1;
        while (i <= _root.myLoadVars.num) {
          action = (eval('_root.myLoadVars.i' + i)).split('_');
          if (action[0] == 's') {
            _root.drawingBoard.paper.lineStyle(action[1], action[2]);
          } else {
            if (action[0] == 'm') {
              _root.drawingBoard.paper.moveTo(action[1], action[2]);
            } else {
              if (action[0] == 'l') {
                _root.drawingBoard.paper.lineTo(action[1], action[2]);
              }
            }
          }
          ++i;
        }
      } else {
        _root.cLine = 1;
        _root.cSteps = Math.round(_root.myLoadVars.num / 200) + 1;
        trace(cSteps);
        _root.myInt = setInterval(drawNextLine, 0);
      }
    }

    function drawNextLine() {
      if (_root.cLine <= _root.myLoadVars.num) {
        i = 1;
        while (i < _root.cSteps) {
          action = (eval('_root.myLoadVars.i' + cLine)).split('_');
          if (action[0] == 's') {
            _root.drawingBoard.paper.lineStyle(action[1], action[2]);
          } else {
            if (action[0] == 'm') {
              _root.drawingBoard.paper.moveTo(action[1], action[2]);
            } else {
              if (action[0] == 'l') {
                _root.drawingBoard.paper.lineTo(action[1], action[2]);
              }
            }
          }
          ++_root.cLine;
          ++i;
        }
      } else {
        clearInterval(_root.myInt);
      }
    }

    function draw(line) {
      action = line.split('_');
      if (action[0] == 's') {
        _root.drawingBoard.paper.lineStyle(action[1], action[2]);
      } else {
        if (action[0] == 'm') {
          _root.drawingBoard.paper.moveTo(action[1], action[2]);
        } else {
          if (action[0] == 'l') {
            _root.drawingBoard.paper.lineTo(action[1], action[2]);
          }
        }
      }
    }

    painting = new Array();
    _root.createEmptyMovieClip('link', 6);
    with (link) {
      lineStyle(1, 0, 0);
      beginFill(0, 0);
      moveTo(0, 0);
      lineTo(640, 0);
      lineTo(640, 480);
      lineTo(0, 480);
      lineTo(0, 0);
      endFill();
    }
    link.onPress = function () {
      getURL(_root.file, '');
    };

    _root.createEmptyMovieClip('drawingBoard', 1);
    with (drawingBoard) {
      lineStyle(1, 0, 100);
      moveTo(58, 1);
      lineTo(639, 1);
      lineTo(639, 479);
      lineTo(58, 479);
      lineTo(58, 1);
      createEmptyMovieClip('paperMask', 3);
      with (paperMask) {
        lineStyle(1, 16777215, 0);
        beginFill(16711680);
        moveTo(59, 2);
        lineTo(639, 2);
        lineTo(639, 479);
        lineTo(59, 479);
        lineTo(59, 2);
      }
      createEmptyMovieClip('paper', 2);
      paper.lineStyle(1, 0, 100);
      paper.setMask(paperMask);
    }
    createEmptyMovieClip('loaderBlock', 5);
    with (loaderBlock) {
      lineStyle(1, 16777215, 0);
      beginFill(16777215, 100);
      moveTo(200, 210);
      lineTo(500, 210);
      lineTo(500, 265);
      lineTo(200, 265);
      lineTo(200, 210);
    }
    createTextField('mytext', 4, 58, 210, 592, 55);
    with (mytext) {
      multiline = false;
      wordWrap = false;
      border = false;
      selectable = false;
      text = '';
    }
    myformat = new TextFormat();
    with (myformat) {
      color = 0;
      bullet = false;
      bold = false;
      underline = false;
      font = 'Arial';
      size = 55;
      align = 'center';
    }
    mytext.setTextFormat(myformat);
    myLoadVars = new LoadVars();
    myLoadVars.load('paintings/' + file + '.txt');
    this.onEnterFrame = function () {
      if (isLoaded(_root.myLoadVars)) {
        mytext.removeTextField();
        loaderBlock.removeMovieClip();
        _root.paint();
        this.onEnterFrame = function () {};

      } else {
        percent = getPercentage(_root.myLoadVars.getBytesLoaded(), _root.myLoadVars.getBytesTotal());
        mytext.text = percent + '%';
        loaderBlock._alpha = percent;
        mytext.setTextFormat(myformat);
      }
    };

  }
}