面向对象技术，包括： 4.1 画红点 4.2 随机生长的树 4.3 弹性球 4.4 蜂群 4.5 荧光咖啡杯 4.6 旋转的陀螺 4.7 生命周期 4.8 图形变换-object-oriented technologies, including : 4.1 4.2 painted red spots were a tree growing flexibility Ball 4.4 4.3 4.5 fluorescence colony which saw 4.6