如何在C＃中逐点绘制形状？

I have the basic idea of how it can be done but I don't really know the code. I want to use a WPF application in Visual Studio. When the user clicks a "Draw" button, it would draw a shape (a spirograph), on the canvas (using a polyline) but the twist is, it needs to draw it point by point, one line at a time so you will see this "animation." Also, the user should be able to cancel/stop the drawing while it is being drawn on canvas. First, it will need to generate a list or array of points (I have more familiarity with arrays), then pass the points to a background worker which will "report its progress" by drawing the shape slowly on the canvas. Here is the code for drawing a spirograph but any shape is ok really.I have the basic idea of how it can be done but