text: #include <iostream>
  #include <thread>
  #include <vector>
  #include <set>
  #include <matplot/matplot.h>
  
  int main() {
      using namespace matplot;
  
      auto [x,y,z] = peaks();
      mesh(x,y,z);
      colormap(palette::parula(5));
  
      wait();
      return 0;
  }