模拟八个无人机同时在空间中做椭圆运动，高度由1.5米变为2米，变回1.5米，再变为1米，最后持平到1.5米。-Simulation of eight unmanned aerial vehicles simultaneously in the space to do elliptical motion, the height　1.5 meters to become 2 meters, back to the 1.5 meters, and then changed to 1 meters, and finally flat to 1.5 meters.