图是用牛顿法求方程z3-1=0的根所得到的“项链”。以上程序采用浮点运算，速度是比较慢的。如果每迭代一次就计算一次距离，则速度会更慢。为了使不同吸引区域有不同的颜色，并且能够表现收敛速度，必须做更多的距离计算，但得到的图形也更美丽。特别是将分界处的“项链”放大来看，会得到精致的结构。-Fig Newton method is used Equation z3-1 = 0 has been the root of the "necklace." The procedure is used floating-point operations, speed is relatively slow. If every iteration on a calculated distance, it would grow more slowly. In order to attract different regions have different colors, and be able to demonstrate the convergence rate and must do more distance, but the graphics are more beautiful. In particular, the boundaries of the "necklace" to enlarge it, will be refined structure.