Click flag. A very simple triangle drawing program starts and plays notes for each triangle point. The notes are lower for points towards the bottom. Hear the musical pattern gradually transform just as the pinwheel drawing transforms.
Each triangle has two points that trigger notes (the points at the center don't trigger notes). The notes are lower for points towards the bottom left. The notes are higher for points towards the top right. More specifically, a louder vibraphone plays notes corresponding to where the point falls on the Y axis. A marimba plays notes corresponding to where a point falls on the X axis. The notes highlight a feature of the pinwheel drawing that sometimes reverses direction The notes highlight a feature of the pinwheel drawing that sometimes reverses direction. The pinwheel drawing program gradually increases the angle of a turn and, at certain points, the points drawn seem to move backwards, then you hear the music change from ascending to descending or the reverse.
