里面收录了19个经典汇编案例例！电子时钟，动画！图形变换！-inside contains 19 classic case compilation cases! Electronic clock, animation! Graphics transform!

画板做的动态图画源码程序，在时钟控制下，使用画板加载变化外形图片，实现动画效果。-Sketchpad do dynamic picture source program under clock control , load change shape picture using Sketchpad , to achieve animation.