题目:编写一个应用程序，在屏幕上出现一个圆心沿正弦曲线轨迹移动的实心圆，要求每隔1/4周期，圆的填充色与圆的边线都发生变化，颜色自己选取，同时，圆的半径在1/4周期之内由正弦幅值的0.2到0.6倍增长。-Topic: write an application that appear on the screen a circle sine curve track along the solid round, ask every quarter cycle, round and round line fills all changes, the color selection himself, at the same time, the round radius 1/4 cycle in the sine amplitude within 0.2 to 0.6 times that of growth.