此代码将 30 个 LED 图像绘制到画布上。如何选择和更改 LED 符号 onMouseDown 事件的来源?
var raster = new Raster();
raster.source="/PNG/Red.png";
var sembol = new Symbol(raster);
for (var i = 0; i < 30; i++) {
var bura = sembol.place();
bura.position = Point.random() * view.size;
bura.scale(0.5);
};