Proper Flash Drawing App

I finally decided to do a flash drawing program thing because people keep submitting them and only put in the smallest amount of scipting just to have drawing a line, so heres a full featured one complete with customisable polygons, fill modes, blend modes, even two filters and an undo function. Enjoy!

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Click, drag, release for basic tools.

Shift makes ellipses into circles.
Holding Control makes the circle have its corner at the start position, instead of being centered there.
Try Control + Shift when drawing circles.

To use the polyline tool, click and drag, press Space to add a corner, release to draw.

The keys 3 to 9 determine the number of sides on the Polygon tool. Pressing 0 will increase the number by, so you can put as many as you want.

There are three modes: line&fill, line, fill

When drawing shapes, the main color is the Fill, the second color is the Line.

Blend Mode doesnt affect the Brush tool.
Alpha doesnt affect the Brush tool.

Ctrl-Z is undo. You can only Undo once. You can Undo the Undo.
You can also Undo by using the right-click menu.

You can right-click for some options.

Also the eraser actually WORKS, it doesnt just draw white lines like in other flash drawing apps I've seen.