该程序用不同颜色的小球的运动轨迹来画出一幅抽象图画。小球共有七个，分别是红，绿，蓝，黑，白，靛青，橙黄色。小球在画布的上方分别间隔相等的距离，同时出发，但各个球的运动速度是逐渐减少的。第一个球最快，从第一个球到第六个球速度逐渐递减，且球的运动方向是逆时针，第七个球是顺时针运动。球的运动轨迹模拟光的反射。以边界的法线为对称轴的对称直线，即小球运动轨迹直线的入射角度等于反射角度。-The program with a different color ball trajectory to draw an abstract picture. Seven balls were red, green, blue, black, white, indigo, orange and yellow. The top of the canvas ball equal distance intervals, respectively, on the same flight, but each movement of the ball speed is gradually reduced. The first ball the fastest, from the first ball to the sixth ball speed gradually decreases, and the direction is counterclockwise movement of the ball, the ball is the seventh clockwise movement. Simulation of the trajectory of the ball of light reflection. Normal to the boundary line for the symmetry axis of symmetry, that is a straight line trajectory the ball incident angle equal to the reflection angle.